Hi everyone how can I plot like a graphic? 

i want to plot

u(x,y,z,t)=tanh(x+y+z-wt),  (w is a constant)

could you help me please? 

The program was written in 2004 with maple 6. Now i'am working by maple 18. And i did'nt launch the program. painleve_test.zip

Thank you for your interest in advance.

     Hi,

i want to solve equation system u0(x,t),u1(x,t),v1(x,t),v0(x,t)v2(x,t) dependent on f(x,t).

I attached file. 

Thanks in advance.

worksheet.mwworksheet.mw

i wrote a procedure for determine a lambda symmetries and first integrals of ODEs.

Procedure is running but commands is getting error.

Can  anybody help me.

Thanks in advance. procedure.mws