Syntax question

General Discussion
1

What is the difference between the following code (please note the use of brackets in the P1):

mesh Th=square(10,10);
fespace Wh(Th,[P1]);

and

mesh Th=square(10,10);
fespace Wh(Th,P1);

Thanks you!

P. Negron.

2

It makes no difference. The two ways are valid.

3

Thank you very much for your answer. Actually my question is related to the example code for eigenvalues for the Laplacian on the unit square. In that code the instruction:

varf b ([u1], [u2]) = int2d(Th)(u1*u2); //no boundary condition

is uses the brackets to “eliminate” or not using boundary conditions. In this case the functions u1 and u2 are scalar functions. How do I “eliminate boundary conditions when I have vector functions, say:

varf b ([u1,u2], [v1,v2]) = int2d(Th)(u1*v1+u2*v2); //no boundary condition

Thank you.

Pablo Negron.