linalg:relu

(linalg:relu a)

Returns a fresh array with every element replaced by max(x, 0.0) -- the rectified linear unit, the most common neural-network activation. Defined as (linalg:maximum a 0.0), so a -0.0 or NaN element becomes 0.0 (the strict comparison's false arm). Rides the linalg:maximum kernel under --simd.