LAWS.contacts_cons: law of bend-prot@0.1.0.0
Import: import bend-prot@0.1.0.0/LAWS.bend as LAWS
Lines 98-104 of bend-prot@0.1.0.0/LAWS.bend: https://jend.leeeet.dev/read.txt?path=bend-prot@0.1.0.0/LAWS.bend&start_line=98&end_line=104

import Base
import bend-prot@0.1.0.0/protein.bend as P
import bend-prot@0.1.0.0/topology.bend as T

# Interface counting peels one head the same way.
law contacts_cons:
  for x: P.Atom
  for xt: List<&2, P.Atom>
  for ys: List<&2, P.Atom>
  for c2: F32
  {T.contacts_between(x <> xt, ys, c2) == Nat.add(T.contacts_between(xt, ys, c2), T.contacts_of_head(x, ys, c2)) : Nat}

Uses (7):
  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=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=bend-prot@0.1.0.0/protein.bend&name=Atom
  https://jend.leeeet.dev/definition.txt?path=bend-prot@0.1.0.0/topology.bend&name=contacts_between
  https://jend.leeeet.dev/definition.txt?path=bend-prot@0.1.0.0/topology.bend&name=contacts_of_head