Here's a Maple bug:

If you define the function f(x) = (5 - y) ^ (4/3), then try to evaluate it at f(-3), you get the wrong answer.  To get the right answer you must evaluate it at f(-3.)  Of course we know that Maple distinguishes between exact answers & decimal answers, but both answers are supposed to be the same.  In the first case, you get 88^(1/3); in the second, the correct answer of 16.0. 

Anyone know what's going on?

Allan

 

 

 

From time to time I check whether the situation with Latex in Maple has improved. Just one random example:

latex(2*x/(x-1));

2\,{\frac {x}{x-1}}

Is it really that hard to do a simple fraction?

Even double quotes in the math mode are still transcribed to a pair of single quotes, as if they were in the text mode,

latex("x");

``x''

Not even talking about spreadsheets and other total failures.

Is latex going to be deprecated (together with all other lower case commands)?

Alec

I'm disappointed with the quality of graphics exported to EPS format;  I'm using Maple 11.

Even with a simple plot, like  

plot( x^2, x=-1..2);

the exported EPS file  (I've tried using both the interactive export, clicking on the graphic) and the explicit   plotoutput   command)  is large and messy, and produces a jaggedy graph when printed.      As I recall this...

As this question stands about the relationship between 'FunctionAdvisor' and 'convert', and it seems that 'convert' is not able to make the possible conversions listed by FunctionAdvisor(specialize, ...), the following command 'fas' (FunctionAdvisor Specialize) seems a posible workaround:

Hi,

I've written a simple LPSolve test program. But it seems to fail to give me the correct answer that satisfy the constraints. Here is the code:

with(Optimization):

cnsts := {x1 + x2 + x3 + x4 + x5 >= 1, x1+x2+x3+x11+x6 >= 1, x7+x9+x10+x4+x5 >=1, x7+x9+x10+x4+x5 >= 1, x7+x9+x10+x11+x6 >=1, x8 + x9 + x10+x4+x5 >=1, x8+x9+x10+x11+x6 >=1};

obj := x1+x2+x3+x4+x5+x6+x7+x8+x9+x10+x11;     

LPSolve(obj,cnsts,assume = {nonnegative});

 

'Int(x^(k+v-1)/(1+x),x = 0 .. infinity)': '%'= value(%);

             infinity
            /          (k + v - 1)
           |          x
           |   ...

The pair of (desktop icon) image files Maple12Classic.png and Maple12.png could more sensibly be installed in some location such as the $MAPLE/etc directory.

Having them get installed, as in Maple 12, to $MAPLE/bin is a little strange.

The usual use of bin directories is for executables, and not binaries in general. Eg. some other binary objects such as shared object libraries may be in lib/, and text shell-scripts may also be in bin/. So the fact thet .png files are "binary" isn't any good reason to place them in bin/.

acer

It would be nicer if the nprofile commandline utility had its own script in $MAPLE/bin similar to the maple and xmaple scripts.

That is the place that one usually either looks for Maple executables or appends to one's PATH. A single location makes more sense and is easier.

It would also be nicer if nprofile help-page mentioned something like the exprofile help-page's comment that, "The preferred method for creating the output  file is with writeto() and/or appendto()."

Does Maple 11 support multithreading on an Intel Macintosh? You may infer from the question that I tried but was unsuccesful. I used one of the simple examples in the Threads:Create help page. I got: Error, (in Threads:-Create) No support for multithreading in this kernel This is Maple 11.02, build 330022. I am running OS X 10.4.11 on a MacPro with 2 x 2.66 GHz Dual-Core Intel Xeon processors.

OK, this time I'm really stymied.   It appears that Maple doesn't follow the same rules of operator precedence when it comes to logical operators.  p &and q &or r should be the same as r &or p &and q, but it isn't.  What gives, and how can I remedy it?

Sometimes I have to write a Maple code compatible to several versions of Maple (typically 9.5 and 10 but sometimes also 11 or VR4) and I am missing a information in Maple help pages - a changelog or, more specifically, a version information. At least, for every particular fuction or package, I am missing the information since which version of Maple it exists (eventually since which version it is obsolete).

`&*`:=1:
f:=(a,b)-> a &* b:
plots[densityplot](f,0..1,0..1,
    colorstyle=HUE, axes=boxed, style=patchnogrid);

gives the same plot as

plots[densityplot](`*`,0..1,0..1,
    colorstyle=HUE, axes=boxed, style=patchnogrid);

The ampersand is ignored!

It is interesting that replacing f with f[1] produces a plot that it should produce. This works reverse to the evalf bug - works OK indexed, and not OK - not indexed.

I suggest adding descriptions of variable, size, and factors() to the GF help page. Currently, they are not even mentioned there.

Alec

Based on a problem / bug with 'fibonacci', which Plouffe states in the symbolic newsgroup, I isolated from his example a situation, where elementary operations on lrage interger sends Maple to death on WIN (but seems to work on a MAC).

www.mapleprimes.com/files/102_fibonacci_bug.mws.zip (190 KB)

I suggest using spell checker on the help pages.

For example, such thing as

Other commands, such as MTM[vertcat], offer new functionality: vercat provides an easy way to combine arrays.

with both vercat and vertcat in the same sentence in the ?MTM help page should be easily caught.

Alec