MaplePrimes - Questions and Posts tagged with symbolic

A factorial sum bug?

edgar — Fri, 07 Jun 2013 19:40:43 Z

Who knows what Maple does wrong on this one?

>	T:=Sum(1/(6*k+1)!, k=0..infinity); evalf(T); value(T); evalf(%);

(1)

Download sum.mw

Simplifying a symbolic expression (4th order). Is there an alternative to the function 'factor'?

ollyjg — Mon, 08 Apr 2013 04:25:09 Z

Hello all,

I would like to use Maple to simplify an expresion of this form:

Why won't Maple use my assumptions in a double integral?

spradlig — Thu, 31 Jan 2013 23:05:41 Z

I am trying to evalute a double integral symbolically using Maple 15. I have gotten it to work when some of the parameters are specific numbers, but it won't work if I use variables, even if I assume sufficient conditions on them for the integral to make sense. I have tried to use AllSolutions but it didn't work. Breaking it down into steps isn't working either.

I am working on a file on a remote server and I don't think I can upload it here. ...

Detect symbolic exponent/floating point in an expression

satya123999 — Wed, 05 Dec 2012 22:13:25 Z

Dear Readers,

Given an expression for e.g. x^n+ y^3.5, how to extract the symbolic/floating point exponent, I tried with degree method but it fails whenvever there is symbolic or floating point exponent. Is there any alternative ?

Thanks,

Regards, Satya

No explicit statement

nerdpole — Fri, 02 Nov 2012 15:20:54 Z

Hi!

I have a piecewise defined function alpha. Its functional directives are stored in a vector A. But when I call up the command

alpha:=(x1,x2,x3)->piecewise(
x1 < 0 , A[1],

0< x1<1 A[2], ...):,

the result (x1,x2,x3)->piecewise(.... , A[1], ...) remains symbolic. What can I do that the entries of A[i] appear in the functional directive?

Thanks!

Is my Maple stuck?

Adonis34 — Fri, 19 Oct 2012 00:37:38 Z

Hello everyone, new member here. I've been working with Maple 16/Mathematica 8/Matlab to find the determinants of some symbolic nxn matrices (a1,1 a1,2 etc). Matlab is able to do them quite easily but when they start getting too large it starts truncating them down to 25000 terms. Mathematica works like a charm but I want to beable to verify the results with Maple. Maple does great up to 7x7 but at 8x8 it seems to also truncate results like Matlab and past that...

Comparison of four symbolic solvers

longrob — Sat, 06 Oct 2012 11:35:15 Z

In it's recent edition of Mathematics Today (in print and online), the UK-based Institute of Mathematics and it's Applications, compared 4 symbolic solvers: Maple 15, Mathcad 15, the student edition of Matlab v5 and the Casio CFX-9970G calculator, concluding that "Maple would be the natural choice for research mathematicians, theortetical physicists, those working in any area where mathematics is demanding or for mathematics undergraduates for whom costs are lower"

Generate (an FFT) matrix from equation and have it simplify as I wish

Jeff — Sat, 29 Sep 2012 22:06:36 Z

I'm trying to create a matrix that mimcs the FFT equation as seen here. (Note that I don't want to do the transform, I just want the symbolic matrix of it.) I want to make the matrix in terms of the symbol omega, but I also want it to reduce correctly. Here's what I mean:

I used this post to figure out:

Heaviside integration question

nugtmaple — Wed, 08 Aug 2012 20:18:51 Z

Does anyone know why the two integrations of a heaviside function (u1test and u2test) are not equal? @Preben Alsholm said that the pure symbolic integration u was not correct so that the value of u2test is not correct either. Did I make any mistake in finding u? Is it possible for maple to find the pure symbolic expression of u correctly? Please help!

How do you get Maple to calculate with symbolic reals and infinity intuitively?

OPems — Tue, 07 Aug 2012 14:17:04 Z

Hi,

I'm using Maple to carry out some calculations in Tropical algebra, which requires taking minima of real numbers and infinity.

I'm currently using symbols rather than real numbers, which is causing a problem, I have (for example) the following lines of Maple code:

> assume(0 < a)
> min(a+infinity, 2*a+infinity)
min(a~ + infinity, 2a~ + infinity)

Identify real and imaginary part of a symbolic expression

kobi — Tue, 31 Jul 2012 10:49:28 Z

I have a symbolic expression of the form:

How to solve system of nonlinear symbolic equations?

fschomacker — Mon, 16 Apr 2012 05:46:54 Z

I've written 2 long nonlinear symbolic equations with 2 unknowns in Maple, but it doesn't solve it and says:"Kernel connection has been lost".

I have attached my worksheet to this message; what should I do?

problem.mw

symbolic extraction

flash — Mon, 12 Dec 2011 15:46:00 Z

Hi,

Im trying to evaluate a Transfer function from a block diagram.

i have written all the equations but i cant find the command to find the symbolic solution

of theta_l/Theta_d in terms of A,B,C,s,Kp,Kv

attched is the maple file.

i use maple 13.

prepratory_1_seonc.mw

Inverse of trigonometric symbolic 6x6 matrix

Phil25 — Thu, 24 Nov 2011 09:44:56 Z

Hello,

i am currently trying to get some equation of motions. For this i have to invert a matrix which looks like this:

A = GL * M * GL.' (6x6)

M is the massmatrix. GL is a matrix with kinematic constraints because i am working on a closed loop subject. The problem is that GL consists of symbolic trigonometric terms which i can't replace with numbers. Because of the multiplication with the transpose and the massmatrix the elements...

Using LeviCivita or Levi_Civita

xaratustra — Sat, 12 Nov 2011 14:18:53 Z

I was trying to use the LeviCivita in the physics package to type the left side of the following equation and let maple compute the right side, where it considers the totally antisymmetric tensor identity which reduces to 4 Kronckers. Then the Kroneckers disappear and give rise to the right hand side. But I don't know how to tell maple to do this. There is also another Levi_Civita command in the tensor package.