quad_form_sym() [2/5]

template<typename EigMat , typename ColVec , require_eigen_t< EigMat > * = nullptr, require_eigen_col_vector_t< ColVec > * = nullptr, require_any_vt_fvar< EigMat, ColVec > * = nullptr>

return_type_t< EigMat, ColVec > stan::math::quad_form_sym ( const EigMat &  A, const ColVec &  B  )

inline

Return the quadratic form \( B^T A B \) of a symmetric matrix.

Template Parameters

EigMat	type of the (symmetric) matrix
ColVec	type of the vector

Parameters

A	symmetric matrix
B	vector

Returns

The quadratic form (a scalar).

Exceptions

std::invalid_argument

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

Definition at line 56 of file quad_form_sym.hpp.