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Question: Empty result set on `pdsolve` in Maple2019

Question:Empty result set on `pdsolve` in Maple2019

lcz 994 Maple 2019
pde pdsolve differential-equations
April 06 2020
0

 Hello! I'm trying to solve the following: 

pde1 := (y+z)*(diff(u(x, y, z), x))+(z+x)*(diff(u(x, y, z), y))+(x+y)*(diff(u(x, y, z), z)) = 0;
{pdsolve(pde1,u(x,y,z))}

Unfortunately, after calling pdsolve , I get an empty result set . Can you help me figure out what's going on?  Does it  really have no solution? 

 

 

 

 

 
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