chain_rule.h

// Copyright 2024, UChicago Argonne, LLC
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// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
 
#include "neml2/tensors/Derivative.h"
 
namespace neml2
{

Derivative<1> chain_rule(const Derivative<1> & dy_du, const Derivative<1> & du_dx);

Derivative<2> chain_rule(const Derivative<2> & d2y_du1u2,
                         const Derivative<1> * du_dx1,
                         const Derivative<1> * du_dx2);

Derivative<2> chain_rule(const Derivative<1> & dy_du, const Derivative<2> & d2u_dx1x2);
 
} // namespace neml2