TensorVjpLAWS.MatmulSoleContract: type of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/autograd/tensor_vjp_LAWS.bend as TensorVjpLAWS
Lines 389-400 of bendtorch-core@0.1.0.0/src/autograd/tensor_vjp_LAWS.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/autograd/tensor_vjp_LAWS.bend&start_line=389&end_line=400

import Base
import bendtorch-core@0.1.0.0/src/shape/core.bend as Shape
import bendtorch-core@0.1.0.0/src/autograd/tensor_backward.bend as Backward
import bendtorch-core@0.1.0.0/src/autograd/tensor_backward_LAWS.bend as TensorBackward

# What a VJP that sends one contribution of a matrix promises: it goes to node
# b with target's dimensions and holds cell(row, column) at row * columns +
# column for every row < rows and column < columns.
type MatmulSoleContract<-b: Nat, -target: Shape.Shape, -rows: Nat, -columns: Nat, -cell: Nat -> Nat -> F32,
  -pass: Backward.Pass> is Type:
  MatmulSoleContract{
    target_id: {TensorBackward.sole_target(TensorBackward.sole(pass)) == Some{b} : Maybe<&2, Nat>},
    dimensions: {TensorBackward.sole_dimensions(TensorBackward.sole(pass)) == Some{Shape.dimensions(target)} : Maybe<&2, List<&2, U32>>},
    value: @+row: Nat -> @row_below: {Nat.is_lt(row, rows) == True{} : Bool} ->
      @+column: Nat -> @column_below: {Nat.is_lt(column, columns) == True{} : Bool} ->
      {TensorBackward.sole_point(TensorBackward.sole(pass), U32.from_nat(Nat.add(Nat.mul(row, columns), column))) ==
        Some{cell(row, column)} : Maybe<&2, F32>}}

Uses (17):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.from_nat
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/autograd/tensor_backward.bend&name=Pass
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/autograd/tensor_backward_LAWS.bend&name=sole
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/autograd/tensor_backward_LAWS.bend&name=sole_dimensions
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/autograd/tensor_backward_LAWS.bend&name=sole_point
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/autograd/tensor_backward_LAWS.bend&name=sole_target
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&name=Shape
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&name=dimensions