erase            5011 modules/core/src/matrix.cpp void SparseMat::erase(int i0, int i1, size_t* hashval)
erase            5030 modules/core/src/matrix.cpp void SparseMat::erase(int i0, int i1, int i2, size_t* hashval)
erase            5050 modules/core/src/matrix.cpp void SparseMat::erase(const int* idx, size_t* hashval)