def brow_l
import bend-ml-tensor-array@0.1.19.0/main.bend as BendMlTensorArrayimport Base
1738def brow_l(-r: Nat, -c: Nat, p: BRow<half(r), c>, y: Bands<Nat.sub(r, half(r)), c>) -> BRow<r, c>:
1739 match p:
1740 case BRow{bx, row}:
1741 BRow{BNode{bx, y}, row}