Implemented IProductWRTBaseSumFac for simplexes
Implemented IProductWRTBaseSumFac in Operators/IProductWRTBase/IProductWRTBaseSumFacKernels.hpp for the following simplexes:
- Triangles
- Pyramids
- Prisms
- Tetrahedrals
Added test cases (tests/test_ipwrtbasesumfac.cpp) which passed.
Edited by Chi Hin Chan