dear friends, I want to solve this integration with numeric methods. when i type it as nested integrals i reach the first answer, but when i want to use int(int), maple doesn't solve it(second answer). what's wrong with the input?

I've been trying to numerically solve (and then plot) this set of equations, to reproduce results from a scientific paper (Berro et al., BPJ 2007). Maple tells me that some matrix is singular - any idea what I can do differently?

Any help much appreciated.

> eqn1 := 15*(diff(theta(s), `$`(s, 2))) = N3(s)*cos(theta(s))-N1(s)*sin(theta(s));                    ...

I want to fsolve one non-linear equation as follows: expr_1/expr_2=C which can not be solvable in maple directly. However, once I use expr_3=simplify(expr_1/expr_2) and then expr_3=C, it returns a result. Something weird happens now. Once I substitute the result in expr_3, it returns a value the same as C. But if I substitute the result in expr_1 and expr_2 respectively and then do a division, the outcome is dramatically different from C, which makes no sense at all. Is it...

Following the last question: After eliminating the units, the equation is still not solved. Such kind of equation is not solvable at all, even numerically? Thanks.

PS: Is it possible to edit a posted question? Sometime I want to add more information but could not edit the old one.

Hi, again, I am a physist. It is convenient to solve problems in presence of units. I have a equation (1-variable) including a erf function to solve. As I substute all the constants (with units) and then use 'solve'. It returns a warning without any result. I am not really familiar with the numeric package in maple. Could anyone give me some advice? Thank you.

Hi, I am a green hand of Maple. I guess this is a common question for many users. Some times, Maple can not deal with an integral with a lot of symbols. However, if I manually simplify the integral somehow so that less simbols are left, keeping the main feature of the integral unchanged, it works. Thus, my question is: Is there some limitation that number of simbol can appear in the integral? What decides whether a integral works or not? Thank you.

hi dear friends

i want to solve this int with numeric methods such that doesn't contain erf function

thanks alot

(my function is e1, and I want to calculate the int of e1)

With the idea developed by Robert Israel on the

I made a program that spits out and alpha and beta at the end of each procedure. What I need to do is assign each alpha and beta a unique name. IE, when it runs the procedure 1, I need it to name them alpha1 and beta1, then for proc2, alpha 2 and beta2. For as many times it needs to run through this process because it may go through proc1 more than once.

It seems I can't find the resource I need, just that one little tidbit in the help files. Any help would be...

What is the Problem? Do not use SingularValues (A, output = ['list'])?
Some care in handling this command?

When integrating 1/x as int(1/x,x) the answer is ln(x) while it should be ln(abs(x)). How does one fixes this mistake?

maple_error.doc

Hi friends,

I have windows 7, 64 bits, and I upgraded my maple to 64-bits version as well (Maple 13.02). But I wonder why in the task manager of windows, maple is still tagged as a 32 bits application (e.g. "maple.exe *32"  and  "mserver.exe *32")? In fact, I think the reason that I cannot run one my maple projects, which needs more than 2GB RAM, comes from this issue. Could you help me resolve the problem?

Thank you!

I've been given the relationship:

R*sqrt(sigma)-1-(1)/(4)*(l-(2*kappa*R^2)/(R*sqrt(sigma)))/(1+coth(R*sqrt(sigma)))-kappa*R^2/6+m/(2*R), for the particular case where m=l=0, and where

R=exp[(kappa*(R^2))/6]. On a sketch of R vs kappa, apparently sigma >0 on the lower branch, but there should be some sigma < 0 on the upper branch.

To attempt to solve this whole problem, I use the following commands:

restart;with(plots):