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Question: possible bug in pdsolve. Too many levels of recursion

Question:possible bug in pdsolve. Too many levels of recursion

nm 9934 Maple 2019
pde pdsolve differential-equations physics
May 18 2019
0

Is the following a bug? I am using Maple 2019  64 bit with latest Physics package 357 on windows 10.


 

> 

restart;
> 

pde :=  diff(w(x,y,z),x)+(y^2- a*exp(alpha*x)*(x*y-1))*diff(w(x,y,z),y)+(c*exp(beta*x)*z^2+b*exp(-beta*x))*diff(w(x,y,z),z)= 0;
sol:=pdsolve(pde,w(x,y,z));

diff(w(x, y, z), x)+(y^2-a*exp(alpha*x)*(x*y-1))*(diff(w(x, y, z), y))+(c*exp(beta*x)*z^2+b*exp(-beta*x))*(diff(w(x, y, z), z)) = 0

Error, (in depends) too many levels of recursion

> 

restart;
> 

pde :=  diff(w(x,y,z),x)+ (b*exp(alpha*x)*y^2 + a*exp(beta*x)*(beta- a*b*exp((alpha+beta)*x)))*diff(w(x,y,z),y)+(c*z^2*exp(gamma*x)+ d*z + k*exp(-gamma*x))*diff(w(x,y,z),z)= 0;
sol:=pdsolve(pde,w(x,y,z));

diff(w(x, y, z), x)+(b*exp(alpha*x)*y^2+a*exp(beta*x)*(beta-a*b*exp((alpha+beta)*x)))*(diff(w(x, y, z), y))+(c*z^2*exp(gamma*x)+d*z+k*exp(-gamma*x))*(diff(w(x, y, z), z)) = 0

Error, (in depends) too many levels of recursion

> 

restart;
> 

pde :=  x*diff(w(x,y,z),x)+ ( a1*exp(alpha*x)*y^2 + beta*y+ a1*b2^2*x^(2*beta)*exp(alpha*x))*diff(w(x,y,z),y)+(a2*x^(2*n)*z^2*exp(lamba*x)+(b2*x^n*exp(lambda*x) - n)*z + c*exp(lambda*x))*diff(w(x,y,z),z)= 0;
sol:=pdsolve(pde,w(x,y,z));

x*(diff(w(x, y, z), x))+(a1*exp(alpha*x)*y^2+beta*y+a1*b2^2*x^(2*beta)*exp(alpha*x))*(diff(w(x, y, z), y))+(a2*x^(2*n)*z^2*exp(lamba*x)+(b2*x^n*exp(lambda*x)-n)*z+c*exp(lambda*x))*(diff(w(x, y, z), z)) = 0

Error, (in depends) too many levels of recursion

> 

 


 

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