flopscope.accounting.matrix_norm_cost

shape:tuple

Shape of the array passed to the analytical cost formula.

ord:object, optional

Argument forwarded to the analytical linalg.matrix_norm cost formula. Defaults to None.

:int

Weighted public cost estimate, floored to match runtime accounting.

This helper multiplies the analytical FLOP count by the active weight from flopscope._weights and then applies int(...) so public estimates match budget deductions.

• Elementwise norms (Frobenius, L1, Linf): 2 * numel (FMA=2, weight=1 baked in).

• SVD-based norms (2-norm, nuclear): values-only SVD cost 2*a*b^2 + 2*b^3 where a=max(m,n), b=min(m,n).