Chose degree and dimension for input
pde23 is for second order, 3 dimensions, 3 independent variables
pde44 is for fourth order, 4 dimensions, 4 independent variables

pde23form.html  enter PDE your definition
pde24form.html  enter PDE your definition
pde34form.html  enter PDE your definition
pde44form.html  enter PDE your definition


uana23.js test
pde23_eq.js test 
run pde23_eq.html test 

pdedef23.js test
pde23_eqn.js test
run pde23_eqn.html test

uana44.js test
pde44_eq.js test 
run pde44_eq.html test 

pdedef44.js test
pde44_eqn.js test
run pde44_eqn.html test