def span_one
bendtorch-core@0.1.0.0 · src/autograd/reduce_parallel_proof.bend:386
import bendtorch-core@0.1.0.0/src/autograd/reduce_parallel_proof.bend as ReduceParallelProof
import Base
import bendtorch-core@0.1.0.0/src/storage/arith.bend as Arith
import bendtorch-core@0.1.0.0/src/autograd/reduce.bend as Reduce
386def span_one(+left: Nat, +extent: Nat, +single: {Nat.is_eq(Reduce.span(left, extent), 1n) == True{} : Bool}) ->
387 {Reduce.span(left, extent) == 1n : Nat}:
388 Arith.eq_true(Reduce.span(left, extent), 1n, single)