log_determinant_ldlt.hpp

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#ifndef STAN_MATH_PRIM_FUN_LOG_DETERMINANT_LDLT_HPP
#define STAN_MATH_PRIM_FUN_LOG_DETERMINANT_LDLT_HPP
 
#include <stan/math/prim/fun/LDLT_factor.hpp>
 
namespace stan {
namespace math {
 
template <typename T, require_not_rev_matrix_t<T>* = nullptr>
inline value_type_t<T> log_determinant_ldlt(LDLT_factor<T>& A) {
  if (A.matrix().size() == 0) {
    return 0;
  }
 
  return sum(log(A.ldlt().vectorD().array()));
}
 
}  // namespace math
}  // namespace stan
 
#endif