log_determinant.hpp

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#ifndef STAN_MATH_PRIM_FUN_LOG_DETERMINANT_HPP
#define STAN_MATH_PRIM_FUN_LOG_DETERMINANT_HPP
 
#include <stan/math/prim/meta.hpp>
#include <stan/math/prim/err.hpp>
#include <stan/math/prim/fun/Eigen.hpp>
 
namespace stan {
namespace math {
 
template <typename EigMat,
          require_eigen_vt<std::is_arithmetic, EigMat>* = nullptr>
inline value_type_t<EigMat> log_determinant(const EigMat& m) {
  if (m.size() == 0) {
    return 0;
  }
  check_square("log_determinant", "m", m);
  return m.colPivHouseholderQr().logAbsDeterminant();
}
 
}  // namespace math
}  // namespace stan
 
#endif