Handling null space of A

2026-07-24 13:20:06 +08:00 · 2016-04-24 13:32:44 -07:00
parent eeee594f09
commit fcc2b8b22a
2 changed files with 6 additions and 2 deletions
@@ -128,6 +128,10 @@ class Problem3D_N(BaseDCProblem):
        MeSigma = self.MeSigma
        Grad = self.mesh.nodalGrad
        A = Grad.T * MeSigma * Grad
+
+        # Handling ... singularity
+        A[0,0] = A[0,0] + 1.
+
        # if self._makeASymmetric is True:
        #     return V.T * A
        return A