def lt_d1
import bendtorch-core@0.1.0.0/src/storage/arith.bend as Arithimport Base
340def lt_d1(+x: Nat, h: {Nat.is_lt(Nat.double(x), 1n) == True{} : Bool}) -> {Nat.is_lt(x, 1n) == True{} : Bool}:
341 match x:
342 case 0n:
343 {==}
344 case 1n+p:
345 Empty.absurd({Nat.is_lt(1n+p, 1n) == True{} : Bool}, clash(h))