def rls.c1a
import bend-kit-collections@0.1.4.1/nat_order.bend as NatOrderimport Base
308def rls.c1a(+l: Nat, +a: Nat, +b: Nat, h2: LE(b, Nat.mul(3n, a))) -> LE(b, Nat.mul(3n, Nat.add(l, a))):
309 by_contra(b, Nat.mul(3n, Nat.add(l, a)), ng => rls.c1a.k(l, a, b, ng, h2))