num::kernel::trsv_upper

Defined in header <kernel/dense.hpp>

template <std::floating_point T>
void trsv_upper(T *x, const T *U, const T *b, idx n) noexcept;  // (1)

template <std::floating_point T>
void trsv_upper(contract::alias_safe_t, T *x, const T *U, const T *b, idx n) noexcept;  // (2)

(1) Back substitution solving upper triangular system \(U \mathbf{x} = \mathbf{b}\) (\(U \in \mathbb{R}^{n \times n}\)).

(2) Explicit alias-safe upper triangular solve; x and b may coincide.