## 33 Reputation

16 years, 158 days

## @Markiyan Hirnyk  Thank you very m...

Thank you very much. "simplify" works for me.

## thanks...

@Preben Alsholm  Thank you very much for your help.

## Allvalues...

Thank you very much. Both two ways worked.

I am curious about the command "Allvalues". If I execute "allvalues(solve(eq, u))", an error apprears

"Error, invalid input: too many and/or wrong type of arguments passed to allvalues; first unused argument is RootOf(_Z^5+_Z^4+_Z^3+_Z^2+_Z-1, index = 2)"

I tried "animate(complexplot, [[evalf(solve(eq, u))], style = point, symbolsize = 10, color = "red"], frames = 50, K = -1 .. 1, background = unitcircle, scaling = constrained, trace = 20)". And it failed.allvalue.mw

## delay...

Are there any functions regarding delay differential equations?

## thank you...

Thank you very much for your help!

## thank you...

Thank you very much for your help!

## thank you...

thank you very much for your kind help!

## thank you...

thank you very much for your kind help!

@acer

Thank you very much for your explanation. It is really very helpful.

It is my first time to hear about "atomic identifier".
I look into the help system, and find in the 2D mode, I enter

f<Ctrl+_>x<Right Arrow><Ctrl+=>
sprintf(%a, %);

the result is  "`#msub(mi(\"f\"),mi(\"x\"))`".

Thank you again for your help!

belief111

## good...

Acer, it is really a good example for me to experience the maple.

However, I am not so familiar with maple commands. I can not understand "cat(`#msub(mi("`,F,`"),mi("`,X,`"))`)" and can not find any information about #msub, mi in the help system. Are there any help materials for me to learn about this?

Thank you!

## Thanks a lot!  The reason I asked ...

Thanks a lot!

The reason I asked this question is that I have a system, for expample,

sys:=alpha*<-xt[0,1]+a[11]*xt[1,1]*xt[2,2]*xt[1,2]+a[12]*xt[2,2]^2*xt[1,2],-xt[0,2]+a[21]*xt[1,1]^2+a[22]*xt[2,2]^3>;

and variables are alpha, seq(seq(xt[i,j],i=0..2),j=1,2).

My purpose is to get the coefficients of alpha^(q[0])* x[0,1]^(q[1])*x[1,1]^(q[2])...x[2,2]^(q[7]) when sum(q[i],i=1..7)=n so that I can seperate the sytem into parts with different orders.  In my application, n is  not a large number, usually not larger than 3.

I have tried Rong's method, and it  worked well. I wonder are there some other ways to seperate the system.

## Thanks a lot!  The reason I asked ...

Thanks a lot!

The reason I asked this question is that I have a system, for expample,

sys:=alpha*<-xt[0,1]+a[11]*xt[1,1]*xt[2,2]*xt[1,2]+a[12]*xt[2,2]^2*xt[1,2],-xt[0,2]+a[21]*xt[1,1]^2+a[22]*xt[2,2]^3>;

and variables are alpha, seq(seq(xt[i,j],i=0..2),j=1,2).

My purpose is to get the coefficients of alpha^(q[0])* x[0,1]^(q[1])*x[1,1]^(q[2])...x[2,2]^(q[7]) when sum(q[i],i=1..7)=n so that I can seperate the sytem into parts with different orders.  In my application, n is  not a large number, usually not larger than 3.

I have tried Rong's method, and it  worked well. I wonder are there some other ways to seperate the system.