I wrote a procedure that solves a volterra integral equation numerically. This procedure  takes N , number of radial basis functions, as parameter  .the problem is:Error,  bad index into Matrix

How can I fix this problem?

here is my procedure:

I'm acquainted with using View - show/hide contents - and unchecking input to hide the input in a worksheet.  My problem is that I would like to do this only some of the time.  I've tried selecting just the text where I want to hide the input but the menu action seems to apply to the whole worksheet.  This is in Maple 14.  Is there someway to hide the input some of the time but leave it visible the rest of the time?

I have a problem:" Write the  equation of all lines passing through the point M(19/12,4) and tangent to the graph of the function f(x) = 2*x^3 - 3*x^2 + 5. I did the following:

restart; 

[> f:=x->2*x^3 - 3*x^2 + 5;                    

[> g:=x->k*(x-19/12)+4;

[> solve([f(x) = g(x), diff(f(x),x) = diff(g(x),x)],[x,k]);

[> h:=k->k*(x-19/12)+4;

Hi,

I need help of your expertize in solving the following queries:

I would start with a sample equation:

Eq1 = u_{xxxx} + u_{xxyy} - v_{xxxy} - v_{xyyy} 
where u_{xxxy} represents 4th order pde of u i.e. d^4/(dx^3 dy).

I get a equation similar to Eq1 (but quite complicated) on solving the 
equilibrium equations. I would like to collect the similar derivatives
for variable u and v together like

Eq2 = d^2/d x^2 ( u_{xx} + u_{yy} ) - d^2/dx dy ( v_{xx} + v_{yy} )

Why does Maple Italicize every letter I type whenever I create a new file?

Is there a way to disable this automatic italicization?

How to work out this integral

I have a problem with dsolve that is explained bellow:

In Maple 14, I get the following result
restart:
eqts:=diff(u(x),x$2)=-M(x)/EI;
                     d  / d      \     M(x)
                    --- |--- u(x)| = - ----
                     dx \ dx     /      EI 
cnds:=u(0)=0,u(l)=0;
                       u(0) = 0, u(l) = 0
M:=x->piecewise(x<=l/2,P/2*x,-P*(x-l)/2);
              /     1    1        1          \

hi, could You help me to write script(program) with maple( maple 13) exercise....?

1) The velocity of a freely falling object near Earth's surface is described by the equation
dv/dt=-g     (1.1)
where v is the velocity, g=9.8m/s^2 . Write a program that employs the Euler method to compute to solution to (1.1); that is, calculate v as a function of t. For simpilicity, assume that the initial velocity is zero-that is, the object starts from rest-and...

Hi and thank you for looking.

I have recently begun advanced maths and need help with maple. Is it possible to input an algebra equation and have maple rearrange it to make it a different subject?

I am new to maple and maths again so any help much appreciated. 

Also can maple for example if I input 6 equations could it or is there a way to get maple to pick two like equations out of them.

Thanks again, Danny 

I wrote a module that has quite a few commands in it. I want to make a help file for it so that when you type something like ?mypackage, something like this will pop up! thanks in advance!

So, I am reading the blog post about Mean Absolute Deviation portfolio optimization that

http://yetanothermathprogrammingconsultant.blogspot.com/2010/04/portfolio-from-qp-to-lp.html

claims that the traditional portfolio optimization problem can be expressed as seen below:

I am not sure however that it is 100% correct for example you have (r[i,t...

Dear Prof

i need a maple code for solving non linear equations by variational iteration mthod.please help me in this problem.

with best regards

hamed daei kasmaei

email:hamedelectroj@yahoo.com

I need to solve the below nonlinear equation for n numerically, assuming taut and taum are between zero and one, not inclusive of zero and one. 

I first used "solve(EQN,n, useassumptions)assuming taum>0, taum<1, taut>0, taut<1;", but no solution was generated. I thus removed useassumptions, and used "solve(EQN,n);", but I received the message "Warning, solutions may have been lost" from Maple. How to solve this problem?

Why

fsolve((a^2-1)/a, fulldigits, -4..4, a=9.0)

say that ' a=9.0' is invalid range?

P.S. If answer exist it also should work with avoid option.

P.P.S. Arguments processing of fsolve is terrible. After formatting and trying to understand eval(fsolve) my brain blows up. Why maple has no universal argument processing utilite avoiding dozenz of 'ifs'?