read LEON:
print(`The first 10 terms of the sequence of dimensions of `):
print(`the space of polynomials of degree<=d, annihilated by the differential operators `):
print(D1^2+D2^2+D3,`and `, D1^3+D2^3+D3^3 ):
print (` where D1, D2, D3 are differentiations w.r.t. to x,y,z resp., are: `):
print(HilSer([D1^2+D2^2+D3,D1^3+D2^3+D3^3],[D1,D2,D3],10)):
print(`This took `, time() , `seconds `):

quit: