BendTensors.MatT.sum_cols: def of bend-tensors@0.0.0.2
Import: import bend-tensors@0.0.0.2/bend_tensors.bend as BendTensors
Lines 961-978 of bend-tensors@0.0.0.2/bend_tensors.bend: https://jend.leeeet.dev/read.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&start_line=961&end_line=978

import Base

# each column's sum: VecT(c)
def MatT.sum_cols(+r: Nat, +c: Nat, m: MatT(r, c)) -> VecT(c):
  match r c:
    case 0n 0n:
      MatB{b} = m
      VecL{Blk.sum_cols(b)}
    case 1n+p 0n:
      MatR{t, b} = m
      x y = MatT.sum_cols(p, 0n, t) MatT.sum_cols(p, 0n, b)
      VecT.add(0n, x, y)
    case 0n 1n+q:
      MatC{l, r2} = m
      x y = MatT.sum_cols(0n, q, l) MatT.sum_cols(0n, q, r2)
      VecN{x, y}
    case 1n+p 1n+q:
      MatQ{a, b, c2, d} = m
      p0 q0 p1 q1 = MatT.sum_cols(p, q, a) MatT.sum_cols(p, q, c2) MatT.sum_cols(p, q, b) MatT.sum_cols(p, q, d)
      VecT.add2(q, p0, q0, p1, q1)

Uses (12):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=Blk.sum_cols
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT.Cols
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT.Leaf
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT.Quad
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT.Rows
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=VecT
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=VecT.Leaf
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=VecT.Node
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=VecT.add
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=VecT.add2