More group theory. Sum and product indexed by the non-neutral part of a set
(* Title: HOL/Imperative_HOL/Imperative_HOL.thy
Author: John Matthews, Galois Connections; Alexander Krauss, Lukas Bulwahn & Florian Haftmann, TU Muenchen
*)
section \<open>Entry point into monadic imperative HOL\<close>
theory Imperative_HOL
imports Array Ref
begin
end