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st0812

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7 years, 231 days
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I know it but this problems in the Optim...

st0812 15
March 14 2018
0 0

I know it but this problems in the Optimisation package are so easy. As far as I understand it is very difficult to solve in maple. You suggest I use another program, right?@AmusingYeti 

Wrong result. drop it. I want to ask dif...

st0812 15
December 07 2017
0 0

Wrong result. drop it. I want to ask different thing. Can we map what we write in Maple into a text file with graphics? For example, if someone on your computer does not have maple installed and wants to see code and results?Is it necessary to have maple installed to be visible?@Carl Love 

animate...

st0812 15
December 07 2017
0 0

How can I write this in animate? I want to see your movements because it's a wave. I write 

animate( plot3d, [u(x,t), x=0..10], t=0..2 );
Error, (in plots/animate) at least three arguments are required
 

@Kitonum 

restart:lambda:=unapply(5*Pi*sqrt(m^2/16...

st0812 15
December 06 2017
0 0
restart:lambda:=unapply(5*Pi*sqrt(m^2/16+n^2/4),m,n);
> u:=(x,y,t)->0.426050*add(add(1/(m^3*n^3)*cos(lambda(m,n)*t)*sin(m*Pi*x/4)*sin(n*Pi*y/2), m=1..100,2), n=1..100,2);
> plot3d(eval(u(x,y,t),t=0.01), x=0..2, y=0..2, style=patchcontour,axes=BOXED);
Error, (in u) invalid input: add expects 2 arguments, but received 3
> plot3d(u(x,y,0.01), x=0..2, y=0..2, style=patchcontour,axes=BOXED);
Error, (in u) invalid input: add expects 2 arguments, but received 3
offf! why is it failing?

@Kitonum 

Thanks,  I cheched there and I drew...

st0812 15
December 06 2017
0 0

Thanks,  I cheched there and I can't  draw it. If I write 

plot3d(u(x,y,t), x=0..2,y=0...2,t=0.01 style=patchcontour,axes=BOXED); give an error(in sum) second argument must be a name, name=a...b, name=RootOf or name=algebraic

 

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