6.1.1 problem number 1

problem number 417

Added January 2, 2019.

Problem 1.1 from Handbook of first order partial differential equations by Polyanin, Zaitsev, Moussiaux.

Solve for \(w(x,y)\) \[ w_x = f(x,y) \]

Mathematica

ClearAll["Global`*"]; 
pde =  D[w[x, y], x] == f[x, y]; 
sol =  AbsoluteTiming[TimeConstrained[DSolve[pde, w[x, y], {x, y}], 60*10]];
 

\[\left \{\left \{w(x,y)\to \int _1^xf(K[1],y)dK[1]+c_1(y)\right \}\right \}\]

Maple

restart; 
pde := diff(w(x,y),x)=f(x,y); 
cpu_time := timelimit(60*10,CodeTools[Usage](assign('sol',pdsolve(pde,w(x,y))),output='realtime'));
 

\[w \left ( x,y \right ) =\int \!f \left ( x,y \right ) \,{\rm d}x+{\it \_F1} \left ( y \right ) \]

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