| sparseinv-package | sparseinv | 
| cholPermute | Sparse Cholesky factorisation with fill-in reducing permutations | 
| cholsolve | Solve the equation Qx = y | 
| cholsolveAQinvAT | Solve the equation X = AQ^-1t(A) under permutations | 
| densify | Densify with explicit zeroes | 
| symb | Return the symbolic representation of a Matrix | 
| Takahashi_Davis | Takahashi equations |