public LinearSolverCholLDL_DDRM()
 {
     this.decomposer = new CholeskyDecompositionLDL_DDRM();
 }
 public LinearSolverCholLDL_DDRM(CholeskyDecompositionLDL_DDRM decomposer)
 {
     this.decomposer = decomposer;
 }