coq-theories 8.9.1-2 (arm64 binary) in ubuntu focal

 Coq is a proof assistant for higher-order logic, which allows the
 development of computer programs consistent with their formal
 specification. It is developed using Objective Caml and Camlp5.
 .
 This package provides existing theories that new proofs can be
 based upon, including theories of arithmetic and Boolean values.