Tensor.cat_eq: def of bendtorch@1.3.0.0
Import: import bendtorch@1.3.0.0/tensor.bend as Tensor
Lines 563-574 of bendtorch@1.3.0.0/tensor.bend: https://jend.leeeet.dev/read.txt?path=bendtorch@1.3.0.0/tensor.bend&start_line=563&end_line=574

import Base

# a and b have the same rank, and the same sizes on every axis but d
def cat_eq(a: List<&2, Nat>, b: List<&2, Nat>, d: Nat) -> Bool:
  match a b d:
    case Nil{} Nil{} _:
      True{}
    case Con{x, ra} Con{y, rb} 0n:
      same(ra, rb)
    case Con{+x, ra} Con{+y, rb} 1n+p:
      # bend-lint: disable-next bend-lint-rules/performance/eager_branch -- a shape predicate over a list of rank <= 4, once per operation; the types and LAWS.bend read its Bool form not-expected-because: a match would change the definition the proofs reduce, for no measurable gain
      Bool.and(Nat.is_eq(x, y), cat_eq(ra, rb, p))
    case _ _ _:
      False{}

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_eq
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/tensor.bend&name=same