nm

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13 years, 12 days

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These are questions asked by nm

This is not new in Maple 2024, and also happens in Maple 2023. But it causes the famous "kernel connection has been lost" each time. 

I think many of the kernel connection has been lost problems I see might be related. It could be memory problem in this case. I wonder if someone will be able to track what causes it. Is it expected that server.exe crash on such input?

ps. Reported to Maplesoft support.

 


 

36292

interface(version);

`Standard Worksheet Interface, Maple 2024.0, Windows 10, March 01 2024 Build ID 1794891`

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1708 and is the same as the version installed in this computer, created 2024, March 27, 16:20 hours Pacific Time.`

restart;

238376

integrand:=(2*x^2022+1)/(x^2023+x);

(2*x^2022+1)/(x^2023+x)

int(integrand,x);


 

Download reproducible_server_crash_test.mw

 

For reference, another software give this result instantly and with no crash:

My PC is windows 10, with 128 GB RAM.

 

May be someone could find what causes this new internal error in Maple 2024. 

I did report it already to Maplesoft. It does not happen in Maple 2023. Attached both worksheets.

interface(version);

`Standard Worksheet Interface, Maple 2024.0, Windows 10, March 01 2024 Build ID 1794891`

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1708 and is the same as the version installed in this computer, created 2024, March 27, 16:20 hours Pacific Time.`

integrand:=(d*x)^m/(a+b*arctanh(c*x^n))^2;

(d*x)^m/(a+b*arctanh(c*x^n))^2

int(integrand,x);

Error, (in int/gparse/gmon) too many levels of recursion

 

 

Download int_gparse_gmon_error_maple_2024_march_27_2024.mw
 

130032

interface(version);

`Standard Worksheet Interface, Maple 2023.2, Windows 10, November 24 2023 Build ID 1762575`

integrand:=(d*x)^m/(a+b*arctanh(c*x^n))^2;

(d*x)^m/(a+b*arctanh(c*x^n))^2

int(integrand,x);

2*x*(c*exp(n*ln(x))-1)*(c*exp(n*ln(x))+1)*exp(m*(ln(d)+ln(x)-((1/2)*I)*Pi*csgn(I*d*x)*(-csgn(I*d*x)+csgn(I*d))*(-csgn(I*d*x)+csgn(I*x))))/(b*c*n*exp(n*ln(x))*(-b*ln(1-c*exp(n*ln(x)))+b*ln(c*exp(n*ln(x))+1)+2*a))+int(-2*exp(m*(ln(d)+ln(x)-((1/2)*I)*Pi*csgn(I*d*x)*(-csgn(I*d*x)+csgn(I*d))*(-csgn(I*d*x)+csgn(I*x))))*(c^2*m*(exp(n*ln(x)))^2+c^2*n*(exp(n*ln(x)))^2+(exp(n*ln(x)))^2*c^2-m+n-1)/(b*c*n*exp(n*ln(x))*(-b*ln(1-c*exp(n*ln(x)))+b*ln(c*exp(n*ln(x))+1)+2*a)), x)

 

 

Download int_gparse_gmon_NO_error_maple_2023.mw

This is just cosmotics, but it looks ugly for me. For some reason Maple converts exp(2*a) to (exp(a))^2 under certain operations such as expand

expr:=exp(2*a);
expand(%);
simplify(%);
expand(%)

.

This happens in worksheet under typesetting level extends or standard.

Any specific reason why Maple likes to rewrite exp(2*a) as (exp(a))^2  and is there a way to tell it not to do that?

ps. it is little more than cosmotic actually, it affects the Latex generated

 

latex(expr)
{\mathrm e}^{2 a}


latex(expand(expr))
\left({\mathrm e}^{a}\right)^{2}

 

Maple 2024 on windows 10

Is this internal error expected? Why does it happen? Reported to Maplesoft just in case.

``

interface(version);

`Standard Worksheet Interface, Maple 2024.0, Windows 10, March 01 2024 Build ID 1794891`

restart;

189352

e:= RootOf(csc(_Z));
simplify(e);

RootOf(csc(_Z))

Error, (in simplify/trig/do/1) expression independent of, _Z

e:= RootOf(csc(x));
simplify(e);

RootOf(csc(_Z))

Error, (in simplify/trig/do/1) expression independent of, _Z

 

 

Download simplify_Z_error_maple_2024_march_22_2024.mw

ps. Reported to Maplesoft just in case.

I do not like this feature at all. called Scrollable Matrices:

https://mapleprimes.com/maplesoftblog/224789-Discover-Whats-New-In-Maple-2024

Is there a way to turn it off? 

In Maple 2024 when I display a wide matrix, it no longer wraps around if the worksheet window width was smaller as it did in Maple 2023. I prefer the 2023 behavior.

A:=Matrix(3,4,{(1, 1) = (y(x) = RootOf(-Intat(1/(_a^(3/2)+1),_a = _Z+x)+x+Intat(1/
(_a^(3/2)+1),_a = 0))), (1, 2) = "explicit", (1, 3) = "", (1, 4) = false, (2, 1
) = (y(x) = -1/2+1/2*I*3^(1/2)-x), (2, 2) = "explicit", (2, 3) = "", (2, 4) = 
false, (3, 1) = (x = -2/3*ln(((y(x)+x)^(3/2))^(1/3)+1)+1/3*ln(((y(x)+x)^(3/2))^
(2/3)-((y(x)+x)^(3/2))^(1/3)+1)+2/3*3^(1/2)*arctan(1/3*(2*((y(x)+x)^(3/2))^(1/3
)-1)*3^(1/2))+1/9*3^(1/2)*Pi), (3, 2) = "implicit", (3, 3) = "", (3, 4) = true}
,datatype = anything,storage = rectangular,order = Fortran_order,shape = []);

 

Screen shot on Maple 2023

 

Screen shot on Maple 2024

I looked at Tools->options->Display and Interface but see nothing there to turn it off.

Maple 2024 on windows 10.

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