quad_form_impl()

template<typename Mat1 , typename Mat2 , require_all_matrix_t< Mat1, Mat2 > * = nullptr, require_any_var_matrix_t< Mat1, Mat2 > * = nullptr>

auto stan::math::internal::quad_form_impl ( const Mat1 &  A, const Mat2 &  B, bool  symmetric  )

inline

Return the quadratic form \( B^T A B \).

Symmetry of the resulting matrix is not guaranteed due to numerical precision.

Template Parameters

Mat1	type of the first (square) matrix
Mat2	type of the second matrix

Parameters

A	square matrix
B	second matrix
symmetric	indicates whether the output should be made symmetric

Returns

The quadratic form

Exceptions

std::invalid_argument

if A is not square, or if A cannot be multiplied by B

Definition at line 117 of file quad_form.hpp.