I have started to use Maple 18 and I have found that my scale starts at 2.*10^16 for all functions I graph no matter if its 3D or 2D. Is there a way to change this scale?

Dear, my attached file take alot time to exicute the result, Please solve this problem. I am waiting your kind response. 

Hirota_Bilinear_Method-3.mw

With my best regards and sincerely.

Muhammad Usman

PhD (Scholar) Mathematics

HITEC University, Taxila

Lecturer of Mathematics

Govt. Degree College Taxila Pakistan.

Visiting Lecturer of Mathematics

University of Wah, Pakistan.

Email: mughal1103@gmail.com

Mob #: +923152329276

1.

similar gap system, which function can output coset table ?

if find example below,

f := FreeGroup( "a", "b" );

g := f / [f.1^2, f.2^3, (f.1*f.2)^5];
tab := CosetTable(g, Subgroup(g, [g.1, g.2*g.1*g.2*g.1*g.2^-1]));

2.

if quotient group is for equivalence relations, what do relations [g.1, g.2*g.1*g.2*g.1*g.2^-1] for? which kind of relations is for input to subgroup parameter which is like relations?

3. equalivance relations in wiki mentioned is to partition cells, how do they satisfy symmetric, reflexive and transitive after partition? how to test these partition?

how to implement a free group with symmetric properties?

i find that equivalence relations = relexive, symmetric and transitive , is only these three ?

if implement symmetric properties, does it mean that adding equivalence relations to group?

how to implement free group with this?

i guess something like

f := FreeGroup( "a", "b" );
g := f / [equivalence relations....];

is there a library storing all kinds of equivalence relations?
https://en.wikipedia.org/wiki/Equivalence_relation
For quotient groups, is there IsEquivalenceRelation and IsEquivalenceClass like gap system?
www.gap-system.org/Manuals/doc/ref/chap33.html
like
f := FreeGroup( "a", "b" );
g := f / [f.1^2, f.2^3, (f.1*f.2)^5];

when i paste words here, most words missing, is there being hacked?

I want to calculate

Lim _x-->1⁺ ([X²]-1)/([X]-1)

I let  x=1+c  and  _c-->0⁺  then we have [X²]=[c²+2c+1]=[2c]+1

Lim _x-->1⁺ ([X²]-1)/([X]-1) = Lim _c-->0⁺ [2c]/[c]

Maple shows the both limitations equal to zero

I want know how maple claculates it

I'd like to pay attention to Maple packages for symmetric functions, posets, root systems, and finite Coxeter groups by John Stembridge. That was estimated as well qualified in Mathoverflow.

Download Define_Question.mwDefine_Question.mw

If there is  an equation or are several equations, I need to obtain all the roots, how can I do???

fsolve ? rootfindings? or what?

If an examples of actual is given,  That will be perfect  !!!

Thanks 

Hi, there

How can we plot the volume of revolution of the region between two curves y=2x-x^2 and y=sqrt(2x-x^2) around the x-axis?

Any help will be appreciated. I used a command in maple 13 but the result was a sphere!

Regards

Yegan

Hi, I am new to Maple. I want to plot a graph in a separate window from command-line maple. I tried the following code and getting this error

> plotsetup(window);
> plot(x,x=-10..10);
Plotting error, no plot device driver for plotdevice=window
>

I tried maplet but I am not getting the plot

> plotsetup(maplet);
> plot(x,x=-10..10);
Initializing Java runtime environment.
>

What should I do to get the plot??

Hello,

I have a procedure wich is something like 

F:=proc(a,b,l) limit(f(a,b),b=l); end proc;

For my specific problem, the limit always exists and is a well defined function

After that, I would like to generate other functions, depending on F(a,b,l), e.g.:

G:=proc(a,b,N) add(F(a,b,l),l=1..N); end proc;

However, when I tried to do that, Maple inserts in G an unevaluated F, depending on the results of the limits. This makes G not work properly (unevaluated), since the limit is not computed before G. I tried to use some intermediate steps, like using unapply command, but it does not works.

If someone can help, I would appreciate.

Hi,

I have a problem with maple solving diffusion equation. I solved the equation as follows

Es := 0.117108e12;
Ef := 0.78125e11;
l := 0.150e-6;
s := 0.500000e-3;
f := 0.5898334197e-6;
o := 0.9e-5;
d := 0.10e-17;
cb := 0.1e7/(19.9);
c := l*f/(d*cb);
PDE := diff(u(x, t), t)-(diff(u(x, t), x, x)) = 0;
IBC1 := {u(x, 0) = 0, (D[1](u))(0, t) = 0, (D[1](u))(1, t) = c};
S1 := pdsolve(PDE, IBC1, numeric, time = t);
S1:-plot(t = 0.6e-2);

i am plotting cincentration along the thickness of the material. i want to know why the concentration is negative. It should not be negative because constant flux 'c' is present at x=1. and flux at x=0 is 0, and also the initial concentration is 0.

Thanks

 

How can I plot the volume of revolution of the region between the curves y=ln(x) and y=-ln(x)on the interval [1,e]

around the y-axis.please specify the command. I used the command: VolumeOfRevolution(ln(x),-ln(x), x=1..e, scaling=constrained,axis=vertical,output=plot). But this command only plots the revolution of the curves not the region between them.

Best Regards

Yegan 

Hi,

I would like to plot E2(t) , but It gives errors. How can I avoid the singularity and solve this problem?

restart: with(plots):
with(Student[NumericalAnalysis]):
g1:=(x,t)->(-sqrt(t)/(2*sqrt(Pi*r^3)))*(sin((r*(x-1)^(2)/(4*t))+(Pi/4))-sin((r*(x+1)^(2)/(4*t))+(Pi/4))):

g2:=(x,t)->int(g1(x,t),r=1..infinity);

g3:=(x,t) -> (diff(g2(x,t),t)):

g4:=(x,t) -> (diff(g2(x,t),x,x)):

g5:=(x,t) -> ((1/2)*(g3(x,t)^2+g4(x,t)^2)):

E2:=t->(int(g5(x,t),x=0..100)):

evalf(E2(0));
Error, (in g1) numeric exception: division by zero
evalf(E2(1));
Error, (in g3) invalid input: diff received 1, which is not valid for its 2nd argument
plot(E2(t),t=0..20);

Best regards,