Hi (-),

Can one in Firedrake split a volume integration in 3D,

in a horizontal part (dx dy) and a vertical part (dz),

as follows:

\int_x\int_y f(x,y,t) [ \int_z g(x,y,z,) dz ] dy dx

instead of

\iiint f(x,y,t) g(x,y,z,t) dx dy dz

?

Best wishes,

Onno