From 3c8598e863a62ba7be086e5767118375f8359601 Mon Sep 17 00:00:00 2001
From: Daniel Arndt <arndtd@ornl.gov>
Date: Wed, 5 Apr 2023 22:15:15 -0400
Subject: [PATCH] Remove QuickMatrix

---
 tests/lac/quickmatrix.h | 102 ----------------------------------------
 1 file changed, 102 deletions(-)
 delete mode 100644 tests/lac/quickmatrix.h

diff --git a/tests/lac/quickmatrix.h b/tests/lac/quickmatrix.h
deleted file mode 100644
index cd834bfab9..0000000000
--- a/tests/lac/quickmatrix.h
+++ /dev/null
@@ -1,102 +0,0 @@
-// ---------------------------------------------------------------------
-//
-// Copyright (C) 2003 - 2021 by the deal.II authors
-//
-// This file is part of the deal.II library.
-//
-// The deal.II library is free software; you can use it, redistribute
-// it, and/or modify it under the terms of the GNU Lesser General
-// Public License as published by the Free Software Foundation; either
-// version 2.1 of the License, or (at your option) any later version.
-// The full text of the license can be found in the file LICENSE.md at
-// the top level directory of deal.II.
-//
-// ---------------------------------------------------------------------
-
-
-/**
- * Hard-coded Laplacian matrix.
- * Just a quick matrix to investigate processor performance.
- * It implements a finite difference scheme on a grid of grid size 1
- * with #nx# times #ny# grid points.
- * The diagonal is scaled to 1, resulting in an effective mesh width of 1/2.
- */
-
-template <typename number>
-class QuickMatrix
-{
-public:
-  /**
-   * Constructor initializing the grid size.
-   */
-  QuickMatrix(unsigned int nx, unsigned int ny);
-
-  /**
-   * Matrix-vector-product.
-   */
-  template <typename number2>
-  void
-  vmult(Vector<number2> &, const Vector<number2> &) const;
-
-protected:
-  const unsigned int nx;
-  const unsigned int ny;
-};
-
-
-template <typename number>
-QuickMatrix<number>::QuickMatrix(unsigned int nx, unsigned int ny)
-  : nx(nx)
-  , ny(ny)
-{}
-
-template <typename number>
-template <typename number2>
-void
-QuickMatrix<number>::vmult(Vector<number2> &d, const Vector<number2> &s) const
-{
-  const unsigned int step  = nx - 1;
-  const unsigned int right = step - 1;
-  const unsigned int top   = ny - 1;
-
-  // Bottom row
-
-  d(0) = s(0) - .25 * (s(1) + s(step));
-
-  for (unsigned int x = 1; x < right; ++x)
-    d(x) = s(x) - .25 * (s(x - 1) + s(x + 1) + s(x + step));
-
-  d(right) = s(right) - .25 * (s(right - 1) + s(right + step));
-
-  // Middle rows
-
-  unsigned int start = 0;
-  for (unsigned int y = 1; y < top; ++y)
-    {
-      start += step;
-      d(start) =
-        s(start) - .25 * (s(start - step) + s(start + 1) + s(start + step));
-
-      for (unsigned int x = 1; x < right; ++x)
-        {
-          const unsigned int xy = start + x;
-          d(xy) =
-            s(xy) - .25 * (s(xy - step) + s(xy - 1) + s(xy + 1) + s(xy + step));
-        }
-      d(start + right) = s(start + right) -
-                         .25 * (s(start + right - 1) + s(start + right + step));
-    }
-
-  // Top row
-
-  start += step;
-  d(start) = s(start) - .25 * (s(start - step) + s(start + 1));
-
-  for (unsigned int x = 1; x < right; ++x)
-    {
-      const unsigned int xy = start + x;
-      d(xy) = s(xy) - .25 * (s(xy - step) + s(xy - 1) + s(xy + 1));
-    }
-  d(start + right) =
-    s(start + right) - .25 * (s(start + right - step) + s(start + right - 1));
-}
-- 
2.39.5