Initial commit

2026-06-01 15:55:59 +08:00
commit 40f9bdb590
1799 changed files with 362227 additions and 0 deletions
--- a/Eigen3/doc/snippets/BiCGSTAB_step_by_step.cpp
+++ b/Eigen3/doc/snippets/BiCGSTAB_step_by_step.cpp
@@ -0,0 +1,14 @@
+  int n = 10000;
+  VectorXd x(n), b(n);
+  SparseMatrix<double> A(n,n);
+  /* ... fill A and b ... */ 
+  BiCGSTAB<SparseMatrix<double> > solver(A);
+  // start from a random solution
+  x = VectorXd::Random(n);
+  solver.setMaxIterations(1);
+  int i = 0;
+  do {
+    x = solver.solveWithGuess(b,x);
+    std::cout << i << " : " << solver.error() << std::endl;
+    ++i;
+  } while (solver.info()!=Success && i<100);