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/SelfAdjointEigenSolver_operatorSqrt.cpp
+++ b/Eigen3/doc/snippets/SelfAdjointEigenSolver_operatorSqrt.cpp
@@ -0,0 +1,8 @@
+MatrixXd X = MatrixXd::Random(4,4);
+MatrixXd A = X * X.transpose();
+cout << "Here is a random positive-definite matrix, A:" << endl << A << endl << endl;
+
+SelfAdjointEigenSolver<MatrixXd> es(A);
+MatrixXd sqrtA = es.operatorSqrt();
+cout << "The square root of A is: " << endl << sqrtA << endl;
+cout << "If we square this, we get: " << endl << sqrtA*sqrtA << endl;