code: private void solveInternalL() {
          // This takes advantage of the diagonal elements always being real numbers
  
          // solve L*y=b storing y in x
          TriangularSolver_ZDRM.solveL_diagReal(t, vv, n);
  
          // solve L^T*x=y
          TriangularSolver_ZDRM.solveConjTranL_diagReal(t, vv, n);
      }
docs: Used internally to find the solution to a single column vector.