FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   PreferencesPreferences   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Forum index » Science and Technology » Math
Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells
Post new topic   Reply to topic Page 1 of 2 [22 Posts] View previous topic :: View next topic
Goto page:  1, 2 Next
Author Message
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Fri Jul 21, 2006 5:32 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

...............................................................

http://www.maplesoft.com/support/

"Maplesoft is committed to providing the highest
level of support for the products it sells"

...............................................................

Dear Maple customer, please eat yet another
Maple regression bug, one of many 1000s.

Bon appetite!

...............................................................

DESCRIPTION: Only Maple V Rel 4 of 1995 and Maple V Rel 5
of 1997 can calculate this limit correctly.

TEST CASE: limit(1/sqrt(1+z^(z^z)), z= -1);

EXPECTED: undefined

CHECKUP: limit(1/sqrt(1+z^(z^z)), z= -1.001);
limit(1/sqrt(1+z^(z^z)), z= -0.999);

9.335771067 + 1.323435694*I
1.312891021 - 9.280839335*I


-------------------- (2005) Maple 10.00 ---------------------
limit(1/(1+z^(z^z))^(1/2),z = -1)
-------------------- (2004) Maple 9.5.1 ---------------------
limit(1/(1+z^(z^z))^(1/2),z = -1)
-------------------- (2004) Maple 9.5 -----------------------
limit(1/(1+z^(z^z))^(1/2),z = -1)
-------------------- (2003) Maple 9 -------------------------
limit(1/(1+z^(z^z))^(1/2),z = -1)
-------------------- (2002) Maple 8 -------------------------
limit(1/(1+z^(z^z))^(1/2),z = -1)
-------------------- (2001) Maple 7 -------------------------
limit(1/(1+z^(z^z))^(1/2),z = -1)
-------------------- (2000) Maple 6 -------------------------
limit(1/(1+z^(z^z))^(1/2),z = -1)
-------------------- (1997) Maple V Rel 5 -------------------
undefined
-------------------- (1995) Maple V Rel 4 -------------------
undefined
-------------------- (1994) Maple V Rel 3 -------------------
limit(1/(1+z^(z^z))^(1/2),z = -1)
--------------------------------------------------------------


...............................................................

First world's man+machine based Maple Crisis review (beta 0.1)

http://maple.bug-list.org/maple-crisis.php

(... beta 0.2 is already of 400+ pages ...)

...............................................................
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Wed Jul 19, 2006 3:20 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

.................................................................

http://www.maplesoft.com/support/

"Maplesoft is committed to providing the highest level
of support for the products it sells"

.................................................................

Sez you!

A Maplesoft customer, enjoy yet another bug the long-liver.

.................................................................

Walter Roberson writes on Tue, Jul 18 2006 8:22 pm

http://groups.google.com/group/comp.soft-sys.math.maple/msg/aac55b559c9b178e

[ ... ]

WR> Notice that the saved text version of foo has lost the
WR> delayed evaluation quotes, so when it is read back, the
WR> procedure is evaluated -once- and the single numeric
WR> result is assigned to foo, instead of the entire delay
WR> expression being assigned to foo.

WR> This problem does not happen when one saves in internal
WR> format (e.g., save foo, "/tmp/foo.m" ). Unfortunately,
WR> internal format is not so easy for a human to read...

[Oh yes. -- VB]

[ ... ]

.................................................................

DESCRIPTION: None of Maple versions since 1994 on can save
the data correctly.

TEST CASE: _FOO := 0:
foo := 'proc() global _FOO; _FOO:=_FOO+1 end()':
foo; foo;
save foo, `/tmp/foo.maple`;
read `/tmp/foo.maple`;
foo; foo;


EXPECTED: 1 2 3 4

-------------------- (2005) Maple 10.00 -----------------------
1 2 foo := 3 3 3
-------------------- (2004) Maple 9.5.1 -----------------------
1 2 foo := 3 3 3
-------------------- (2004) Maple 9.5 -------------------------
1 2 foo := 3 3 3
-------------------- (2003) Maple 9 ---------------------------
1 2 foo := 3 3 3
-------------------- (2002) Maple 8 ---------------------------
1 2 foo := 3 3 3
-------------------- (2001) Maple 7 ---------------------------
1 2 foo := 3 3 3
-------------------- (2000) Maple 6 ---------------------------
1 2 foo := 3 3 3
-------------------- (1997) Maple V Rel 5 ---------------------
1 2 foo := 3 3 3
-------------------- (1995) Maple V Rel 4 ---------------------
1 2 foo := 3 3 3
-------------------- (1994) Maple V Rel 3 ---------------------
1 2 foo := 3 3 3
----------------------------------------------------------------


.................................................................

Maple bugs: An unknown elegant bug discovered
by Jean-Michel Collard

http://groups.google.com/group/sci.math.symbolic/msg/b4fb82dd12304dd6

.................................................................
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Tue Jul 18, 2006 11:26 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

.................................................................

http://www.maplesoft.com/support/

"Maplesoft is committed to providing the highest level
of support for the products it sells"

.................................................................

Walter Roberson writes on Mon, Jul 17 2006 11:40 pm

http://groups.google.com/group/comp.soft-sys.math.maple/msg/91e587e4f51ba18f

[ ... ]

WR> First, notice that the 'local k' has disappeared, leaving
WR> k as a reference to the global variable k.

WR> Second notice that the expression has been moved out of
WR> add() and assigned to the new local variable t4. Local
WR> variables have first-evaluation semantics, so the variable
WR> is not re-evaluated for each of add()'s iteration over k.

[ ... ]

.................................................................

DESCRIPTION: None of Maple versions since 1997 on can
generate the required trivial code correctly.

TEST CASE: foo := proc (p,q) local k; add((p[k]-q[k])^2,
k=1..2) end:
fooo := codegen[optimize](foo):
fooo(a,b);

EXPECTED: (a[1]-b[1])^2+(a[2]-b[2])^2


-------------------- (2005) Maple 10.00 -----------------------
2*(a[k]-b[k])^2
-------------------- (2004) Maple 9.5.1 -----------------------
2*(a[k]-b[k])^2
-------------------- (2004) Maple 9.5 -------------------------
2*(a[k]-b[k])^2
-------------------- (2003) Maple 9 ---------------------------
2*(a[k]-b[k])^2
-------------------- (2002) Maple 8 ---------------------------
2*(a[k]-b[k])^2
-------------------- (2001) Maple 7 ---------------------------
2*(a[k]-b[k])^2
-------------------- (2000) Maple 6 ---------------------------
2*(a[k]-b[k])^2
-------------------- (1997) Maple V Rel 5 ---------------------
Warning, `k` in call to `add` is not local
2*(a[k]-b[k])^2
-------------------- (1995) Maple V Rel 4 ---------------------
N/A
-------------------- (1994) Maple V Rel 3 ---------------------
N/A
----------------------------------------------------------------


.................................................................

Other Maple codegen bugs

http://groups.google.com/groups/search?q=Maple+codegen+bug&qt_s=Search

.................................................................
Back to top
Robert B. Israel
science forum Guru


Joined: 24 Mar 2005
Posts: 2151

PostPosted: Mon Jul 17, 2006 10:47 pm    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

In article <1153149739.123254.150050@b28g2000cwb.googlegroups.com>,
Vladimir Bondarenko <vb@cybertester.com> wrote:

Quote:
DESCRIPTION: The solution to a boundary value problem
for an ODE of the second order depends
on a free parameter _C2.

Only Maple 6 of 2000 can solve this BVP
correctly.

TEST CASE: dsolve({diff(y(z),z$2)= y(z)/z^3,
y(0)= 0, y(1)= 1}, y(z));

The DE has an irregular singular point at z=0, so specifying a boundary
condition at z=0 is a bad idea in general. dsolve is not sophisticated
enough to handle something like this.

Quote:
EXPECTED: y(z) = 1/BesselY(1,-2*I)*z^(1/2)*
BesselY(1,-2*I/z^(1/2))

This does not go to 0 as z -> 0+. The real part
goes to +infinity and the imaginary part to -infinity.
Try this:

Quote:
y(z) = limit(rhs(dsolve({de,y(p)=0,y(1)=1})),p=0,right);


y(z) = (BesselI(1,2/z^(1/2))+BesselY(1,-2*I/z^(1/2)))/
(BesselI(1,2)+BesselY(1,-2*I))*z^(1/2)

Robert Israel israel@math.ubc.ca
Department of Mathematics http://www.math.ubc.ca/~israel
University of British Columbia Vancouver, BC, Canada
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Mon Jul 17, 2006 3:22 pm    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

.............................................................

http://www.maplesoft.com/

"were totally blown away by Maplesoft's Maple 10
mathematical package"

.............................................................

Reads:

http://www.maplesoft.com/

[Being a testing amateur, we]

"were totally blown away by Maplesoft's Maple 10
mathematical package"

[because we have not enough time or care to read
the postings by the Cyber Tester's engineers, and
thus we are not able to realize the simple truth
that there are many dozens of thousands distinct
Maple bugs including but not limited to many 1000s
of (multiple) regression bugs.

Really, why care, we are a writer, not a reader.

So, dear Editor, pls send us our fee asap.]

.............................................................

DESCRIPTION: The solution to a boundary value problem
for an ODE of the second order depends
on a free parameter _C2.

Only Maple 6 of 2000 can solve this BVP
correctly.

TEST CASE: dsolve({diff(y(z),z$2)= y(z)/z^3,
y(0)= 0, y(1)= 1}, y(z));

EXPECTED: y(z) = 1/BesselY(1,-2*I)*z^(1/2)*
BesselY(1,-2*I/z^(1/2))

CHECKUP: ode := diff(y(z),z$2)= y(z)/z^3:
ics := y(0)= 0, y(1)= 1:
sol := y(z) = 1/BesselY(1,-2*I)*z^(1/2)*
BesselY(1,-2*I/z^(1/2)):
odetest(sol, [ode, ics]);

[0, 0, 0]


-------------------- (2005) Maple 10.00 -------------------
y(z) = -(_C2*BesselY(1,-2*I)-1)/BesselI(1,2)*z^(1/2)*BesselI
(1,2/z^(1/2))+_C2*z^(1/2)*BesselY(1,-2*I/z^(1/2))
-------------------- (2004) Maple 9.5.1 -------------------
y(z) = -(_C2*BesselY(1,-2*I)-1)/BesselI(1,2)*z^(1/2)*BesselI
(1,2/z^(1/2))+_C2*z^(1/2)*BesselY(1,-2*I/z^(1/2))
-------------------- (2004) Maple 9.5 ---------------------
y(z) = -(_C2*BesselY(1,-2*I)-1)/BesselI(1,2)*z^(1/2)*BesselI
(1,2/z^(1/2))+_C2*z^(1/2)*BesselY(1,-2*I/z^(1/2))
-------------------- (2003) Maple 9 -----------------------
y(z) = -(_C2*BesselY(1,-2*I)-1)/BesselI(1,2)*z^(1/2)*BesselI
(1,2/z^(1/2))+_C2*z^(1/2)*BesselY(1,-2*I/z^(1/2))
-------------------- (2002) Maple 8 -----------------------
y(z) = -(_C2*BesselY(1,-2*I)-1)/BesselI(1,2)*z^(1/2)*BesselI
(1,2/z^(1/2))+_C2*z^(1/2)*BesselY(1,-2*I/z^(1/2))
-------------------- (2001) Maple 7 -----------------------
y(z) = -(_C2*BesselY(1,-2*I)-1)/BesselI(1,2)*z^(1/2)*BesselI
(1,2/z^(1/2))+_C2*z^(1/2)*BesselY(1,-2*I/z^(1/2))
-------------------- (2000) Maple 6 -----------------------
y(z) = 1/BesselY(1,-2*I)*z^(1/2)*BesselY(1,-2*I/z^(1/2))
-------------------- (1997) Maple V Rel 5 -----------------
y(z) = undefined
-------------------- (1995) Maple V Rel 4 -----------------
NULL
-------------------- (1994) Maple V Rel 3 -----------------
NULL
------------------------------------------------------------

.............................................................
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Mon Jul 17, 2006 3:05 pm    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

.............................................................

Vladimir Bondarenko writes on Mon, Jul 17 2006 11:58 am
http://groups.google.com/group/comp.soft-sys.math.maple/msg/0555e1f2818779e2

Thomas Richard writes on Mon, Jul 17 2006 3:16 pm
http://groups.google.com/group/comp.soft-sys.math.maple/msg/4b77668b6b992847

.............................................................

A typo is corrected and the data is extended due to
Herr Thomas Richard. We observe here one of several
typical kinds of Maple quality destruction we called
"spike".

.............................................................

TEST CASE: dsolve({diff(y(z),z$2)= y(z)/z,
y(0) = 0, D(y)(0)=1},y(z));

EXPECTED: y(z) = z^(1/2)*BesselI(1,2*z^(1/2))

CHECKUP: ode := diff(y(z),z$2)= y(z)/z:
ics := y(0)=0, D(y)(0)=1:
sol := y(z) = z^(1/2)*BesselI(1,2*z^(1/2)):
odetest(sol, [ode, ics]);

[0, 0, 0]

-------------------- (2006) Maple 10.04 -------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2005) Maple 10.01 -------------------
NULL <------------------------------------------------ BUG
-------------------- (2004) Maple 9.5.1 -------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2004) Maple 9.5 ---------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2003) Maple 9 -----------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2002) Maple 8 -----------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2001) Maple 7 -----------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2000) Maple 6 -----------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (1997) Maple V Rel 5 -----------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (1995) Maple V Rel 4 -----------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (1994) Maple V Rel 3 -----------------
NULL
------------------------------------------------------------


COMPARE: Mathematica 5.2

DSolve[{D[y[z],{z,2}]==y[z]/z, y[0]==0, y'[0]==1}, y[z],z]

{{y[z] -> Sqrt[z]*BesselI[1, 2*Sqrt[z]]}}

MuPAD 4.0

solve(ode({diff(y(z),z$2)= y(z)/z, y(0)=0, y'(0)=1},y(z)));

{z^(1/2)*besselI(1, 2*z^(1/2))}

.............................................................
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Mon Jul 17, 2006 8:58 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

.............................................................

http://www.maplesoft.com/

Being a testing amateur, we

"were totally blown away by Maplesoft's Maple 10
mathematical package"

because we have not enough time or care to read
the postings by the Cyber Tester's engineers, and
thus we are not able to realize the simple truth
that there are many dozens of thousands distinct
Maple bugs including but not limited to many 1000s
of (multiple) regression bugs.

Really, why care, we are a writer, not a reader.

.............................................................

TEST CASE: dsolve({diff(y(z),z$2)= y(z)/z,
y(0) = 0, D(y)(0)=1},y(z));

EXPECTED: y(z) = z^(1/2)*BesselI(1,2*z^(1/2))

CHECKUP: ode := diff(y(z),z$2)= y(z)/z:
ics := y(0)=1, D(y)(0)=1:
sol := y(z) = z^(1/2)*BesselI(1,2*z^(1/2)):
odetest(sol, [ode, ics]);

[0, 1, 0]


-------------------- (2005) Maple 10.00 -------------------
NULL
-------------------- (2004) Maple 9.5.1 -------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2004) Maple 9.5 ---------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2003) Maple 9 -----------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2002) Maple 8 -----------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2001) Maple 7 -----------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (2000) Maple 6 -----------------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (1997) Maple V Rel 5 -----------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (1995) Maple V Rel 4 -----------------
y(z) = z^(1/2)*BesselI(1,2*z^(1/2))
-------------------- (1994) Maple V Rel 3 -----------------
NULL
------------------------------------------------------------


COMPARE: Mathematica 5.2

DSolve[{D[y[z],{z,2}]==y[z]/z, y[0]==0, y'[0]==1}, y[z],z]

{{y[z] -> Sqrt[z]*BesselI[1, 2*Sqrt[z]]}}

MuPAD 4.0

solve(ode({diff(y(z),z$2)= y(z)/z, y(0)=0, y'(0)=1},y(z)));

{z^(1/2)*besselI(1, 2*z^(1/2))}

.............................................................

Man + Machine Review Of Maple Crisis

http://maple.bug-list.org/maple-crisis.php

.............................................................
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Mon Jul 17, 2006 7:58 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

Mr Leo Lazauskas, masters student in applied mathematics,
The University of Adelaide, Australia

http://www.maths.adelaide.edu.au/applied/graduates/RGradStudents/llazausk.html

wrote on Fri, Jul 14 2006 10:58 am

http://groups.google.com/group/sci.math.symbolic/msg/a3b5778365c087be


My answer is

http://web.tickle.com/tests/uiq/index-pop.jsp?sid=&supp=&z=
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Sun Jul 16, 2006 2:48 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

.............................................................

http://www.maplesoft.com/

"The Maple 10 interactive environment is the easiest way to
harness the full power of mathematics"

.............................................................

TEST CASE: sum(n!, n= 10^5..infinity);

EXPECTED: infinity # in 0 second

CHECKUP: evalf(Int(n!, n= 10^5..infinity));

Float(infinity)


-------------------- (2005) Maple 10.00 -------------------
infinity 1351.874 seconds
-------------------- (2004) Maple 9.5.1 -------------------
infinity 1156.162 seconds
-------------------- (2004) Maple 9.5 ---------------------
infinity 1095.195 seconds
-------------------- (2003) Maple 9 -----------------------
infinity 1018.174 seconds
-------------------- (2002) Maple 8 -----------------------
infinity 1180.948 seconds
-------------------- (2001) Maple 7 -----------------------
infinity 738.441 seconds
-------------------- (2000) Maple 6 -----------------------
GAMMA(100001)*hypergeom([1, 100001],[],1) 737.079 seconds
-------------------- (1997) Maple V Rel 5 -----------------
Error, (in expand/factorial) object too large 6.900 second
-------------------- (1995) Maple V Rel 4 -----------------
Error, (in expand/factorial) object too large 10.491 seconds
-------------------- (1994) Maple V Rel 3 -----------------
sum(n!,n = 100000 .. infinity) 0 second
------------------------------------------------------------

COMPARE: Timing[Sum[n!, {n, 10^5, Infinity}]]

Sum::div: Sum does not converge

{0.01 Second, Sum[n!, {n,100000,Infinity}]}

.............................................................

http://www.wolfram.com/technology/guide/

Wolfram Technology Guide explains important, often unique
Mathematica technologies and relates them to practical
advantages for users

.............................................................

http://www.wolfram.com/products/mathematica/trial.cgi

Get a fully functional, 15-day, save-disabled trial version
of Mathematica 5.2.

Macintosh
Windows
Linux x86/x86-64bit
HP Tru64 Unix
HP-UX
IBM AIX
Linux-Itanium
SGI IRIX
Solaris UltraSparc
Solaris x86

.............................................................
Back to top
Leo
science forum beginner


Joined: 17 Jul 2005
Posts: 6

PostPosted: Fri Jul 14, 2006 7:58 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

Vladimir Bondarenko wrote:
Quote:
Mate, I am really sorry to clog the groups even with such a tiny
remark about you, but over my career, I have met about a dozen
suckers like you who had no qualification in QA whatsoever, and
never measured their IQ.

But where those guys are now...


Getting laid?
Back to top
Dave (from the UK)
science forum addict


Joined: 12 Jan 2006
Posts: 76

PostPosted: Tue Jul 11, 2006 10:49 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

Vladimir Bondarenko wrote:

Quote:
Buy Maple, The World's Most Screwed Computer Algebra System

As someone who lurks around here sometimes could you explain to me what
your interest in Maple is? If you feel its the worlds most screwed
computer algebra system why don't use just ignore it

Or perhaps use my CAS below which is bug free - always computing the
result exactly with no bugs. (Assuming your compiler or operating system
are not broken of course).

Here is the source code - feel free to copy and redistribute if you wish.

#include <stdio.h>
int main(int argc, char **argv)
{
printf("1 + 1 = 2\n");
return(0);
}

I just downloaded a scientific calculator for my Pocket PC and found it
was very poor indeed. But I don't feel the need to make a life-long
hobby out of pointing out how bad it is to others. I just delete it and
move on.


--
Dave K MCSE.

MCSE = Minefield Consultant and Solitaire Expert.

Please note my email address changes periodically to avoid spam.
It is always of the form: month-year@domain. Hitting reply will work
for a couple of months only. Later set it manually.

http://witm.sourceforge.net/ (Web based Mathematica front end)
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Tue Jul 11, 2006 12:21 am    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

Mate, I am really sorry to clog the groups even with such a tiny
remark about you, but over my career, I have met about a dozen
suckers like you who had no qualification in QA whatsoever, and
never measured their IQ.

But where those guys are now...

Mate wrote:
Quote:
Vladimir Bondarenko wrote:

Take it or leave it, but right away I am the # 1 world's
QA engineer in this field.


What about # 0 ?
Back to top
Mate
science forum beginner


Joined: 16 Aug 2005
Posts: 42

PostPosted: Mon Jul 10, 2006 5:30 pm    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

Vladimir Bondarenko wrote:

Quote:
Take it or leave it, but right away I am the # 1 world's
QA engineer in this field.


What about # 0 ?
Back to top
Vladimir Bondarenko
science forum Guru


Joined: 23 Apr 2005
Posts: 601

PostPosted: Mon Jul 10, 2006 5:06 pm    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

Mate writes on Mon, Jul 10 2006 3:29 pm

http://groups.google.com/group/comp.soft-sys.math.maple/msg/08cceec73e4aaf4d


Thanks for your comment.

You mean this?

product(sin(k/1), k=1..0);
product(sin(k/1), k=1..1);

1
sin(1)

OK. Also, the answer

limit(product(sin(k/n), k=1..n), n = 1)

would not be too bad, as I already pointed out. But in fact,
in the given case, I do not feel it's really material what
is the expected answer.

The main point is that Maple 8 - Maple 9 - Maple 10 return
a piece of total bunk, exp(sum(ln(sin(k)),k = 1 .. n)) .

M> You shoult "limit" yourself to the real Maple bugs,

Take it or leave it, but right away I am the # 1 world's
QA engineer in this field.

http://groups.google.com/group/sci.math.symbolic/msg/5123d38af7c24ad3

This said, please realize that the showed publicly stuff
is a far cry from my last word in the field.

M> You shoult "limit" yourself to the real Maple bugs,

Jocularly speaking, with the course of time, I decided that
I was too lazy to discover Maple bugs.

This is why I invented the VM machine we keep implementing.

But of course, this explanation shows only one of the
aspects of why I decided to do it; now it's still ahead
of time to discuss this.

M> or have you discovered all of them?

The VM machine has already discovered far many more
distinct Maple bugs than we the human being have done
and posted to public domain, altogether.

However, the shower of distinct Maple bug manifestations
is not getting weaker...

One fine day, not tomorrow, we will come back to this
point.


Mate wrote:
Quote:
Vladimir Bondarenko wrote:
................................................................

DESCRIPTION: The value of the limit depends on the point
where the limit is taken.

TEST CASE: limit(product(sin(k/n), k=1..n), n = 1);

EXPECTED: sin(1) # best
limit(product(sin(k/n),k=1..n),n=1) # tolerable

Your expected value is not correct, because the side limits for n --> 1
are not equal:
limit to the right = sin(1)
limit to the left = 1.
You shoult "limit" yourself to the real Maple bugs,
or have you discovered all of them?

Mate
Back to top
Mate
science forum beginner


Joined: 16 Aug 2005
Posts: 42

PostPosted: Mon Jul 10, 2006 12:29 pm    Post subject: Re: Maplesoft is committed to providing the highest level of blatant lie about support for the products it sells Reply with quote

Vladimir Bondarenko wrote:
Quote:
................................................................

DESCRIPTION: The value of the limit depends on the point
where the limit is taken.

TEST CASE: limit(product(sin(k/n), k=1..n), n = 1);

EXPECTED: sin(1) # best
limit(product(sin(k/n),k=1..n),n=1) # tolerable

Your expected value is not correct, because the side limits for n --> 1
are not equal:
limit to the right = sin(1)
limit to the left = 1.
You shoult "limit" yourself to the real Maple bugs,
or have you discovered all of them?

Mate
Back to top
Google

Back to top
Display posts from previous:   
Post new topic   Reply to topic Page 1 of 2 [22 Posts] Goto page:  1, 2 Next
View previous topic :: View next topic
The time now is Tue Dec 12, 2017 7:34 pm | All times are GMT
Forum index » Science and Technology » Math
Jump to:  

Similar Topics
Topic Author Forum Replies Last Post
No new posts JSH: Truth is the highest ideal jstevh@msn.com Math 9 Thu Jul 20, 2006 5:18 am
No new posts Maplesoft: Propagating math crass ignorance worldwide Vladimir Bondarenko Math 3 Sun Jul 16, 2006 6:55 am
No new posts Maple bugs: Yes, What is with Maplesoft? Vladimir Bondarenko Math 0 Wed Jul 12, 2006 7:36 am
No new posts highest-k tubing that won't corrode in Lithium Chloride? dances_with_barkadas@yaho Chem 3 Tue Jul 11, 2006 9:10 am
No new posts Level Instrument for Interface measurement Ramesh S Control 3 Tue Jul 04, 2006 6:04 pm

Copyright © 2004-2005 DeniX Solutions SRL
Other DeniX Solutions sites: Electronics forum |  Medicine forum |  Unix/Linux blog |  Unix/Linux documentation |  Unix/Linux forums  |  send newsletters
 


Powered by phpBB © 2001, 2005 phpBB Group
[ Time: 1.1922s ][ Queries: 16 (1.1626s) ][ GZIP on - Debug on ]