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diff --git a/thirdparty/thekla_atlas/nvmath/Solver.h b/thirdparty/thekla_atlas/nvmath/Solver.h
new file mode 100644
index 0000000000..2bbf92736a
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+++ b/thirdparty/thekla_atlas/nvmath/Solver.h
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+// This code is in the public domain -- castanyo@yahoo.es
+
+#pragma once
+#ifndef NV_MATH_SOLVER_H
+#define NV_MATH_SOLVER_H
+
+#include "nvmath.h"
+
+namespace nv
+{
+    class SparseMatrix;
+    class FullVector;
+
+
+    // Linear solvers.
+    NVMATH_API bool LeastSquaresSolver(const SparseMatrix & A, const FullVector & b, FullVector & x, float epsilon = 1e-5f);
+    NVMATH_API bool LeastSquaresSolver(const SparseMatrix & A, const FullVector & b, FullVector & x, const uint * lockedParameters, uint lockedCount, float epsilon = 1e-5f);
+    NVMATH_API bool SymmetricSolver(const SparseMatrix & A, const FullVector & b, FullVector & x, float epsilon = 1e-5f);
+    //NVMATH_API void NonSymmetricSolver(const SparseMatrix & A, const FullVector & b, FullVector & x, float epsilon = 1e-5f);
+
+} // nv namespace
+
+
+#endif // NV_MATH_SOLVER_H