quad_form() [1/8]

template<typename EigMat1 , typename EigMat2 , require_all_eigen_t< EigMat1, EigMat2 > * = nullptr, require_not_eigen_col_vector_t< EigMat2 > * = nullptr, require_any_vt_fvar< EigMat1, EigMat2 > * = nullptr>

promote_scalar_t< return_type_t< EigMat1, EigMat2 >, EigMat2 > stan::math::quad_form ( const EigMat1 &  A, const EigMat2 &  B  )

inline

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

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

Template Parameters

EigMat1	type of the first (square) matrix
EigMat2	type of the second matrix

Parameters

A	square matrix
B	second matrix

Returns

The quadratic form, which is a symmetric matrix of size Cb.

Exceptions

std::invalid_argument

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

Definition at line 31 of file quad_form.hpp.