(*
Title: The Calculus of Communicating Systems
Author/Maintainer: Jesper Bengtson (jebe@itu.dk), 2012
*)
theory Strong_Sim_SC
imports Strong_Sim
begin
lemma resNilLeft:
fixes x :: name
shows "(νx)0 ↝[Rel] 0"
by(auto simp add: simulation_def)
lemma resNilRight:
fixes x :: name
shows "0 ↝[Rel] (νx)0"
by(auto simp add: simulation_def elim: resCases)
lemma test[simp]:
fixes x :: name
and P :: ccs
shows "x ♯ [x].P"
by(auto simp add: abs_fresh)
lemma scopeExtSumLeft:
fixes x :: name
and P :: ccs
and Q :: ccs
assumes "x ♯ P"
and C1: "∧y R. y ♯ R ==> ((νy)R, R) ∈ Rel"
and "Id ⊆ Rel"
shows "(νx)(P ⊕ Q) ↝[Rel] P ⊕ (νx)Q"
using assms
apply(auto simp add: simulation_def)
by(elim sumCases resCases) (blast intro: Res Sum1 Sum2 C1 dest: freshDerivative)+
lemma scopeExtSumRight:
fixes x :: name
and P :: ccs
and Q :: ccs
assumes "x ♯ P"
and C1: "∧y R. y ♯ R ==> (R, (νy)R) ∈ Rel"
and "Id ⊆ Rel"
shows "P ⊕ (νx)Q ↝[Rel] (νx)(P ⊕ Q)"
using assms
apply(auto simp add: simulation_def)
by(elim sumCases resCases) (blast intro: Res Sum1 Sum2 C1 dest: freshDerivative)+
lemma scopeExtLeft:
fixes x :: name
and P :: ccs
and Q :: ccs
assumes "x ♯ P"
and C1: "∧y R T. y ♯ R ==> ((νy)(R ∥ T), R ∥ (νy)T) ∈ Rel"
shows "(νx)(P ∥ Q) ↝[Rel] P ∥ (νx)Q"
using assms
by(fastforce elim: parCases resCases intro: Res C1 Par1 Par2 Comm dest: freshDerivative simp add: simulation_def)
lemma scopeExtRight:
fixes x :: name
and P :: ccs
and Q :: ccs
assumes "x ♯ P"
and C1: "∧y R T. y ♯ R ==> (R ∥ (νy)T, (νy)(R ∥ T)) ∈ Rel"
shows "P ∥ (νx)Q ↝[Rel] (νx)(P ∥ Q)"
using assms
by(fastforce elim: parCases resCases intro: Res C1 Par1 Par2 Comm dest: freshDerivative simp add: simulation_def)
lemma sumComm:
fixes P :: ccs
and Q :: ccs
assumes "Id ⊆ Rel"
shows "P ⊕ Q ↝[Rel] Q ⊕ P"
using assms
by(force simp add: simulation_def elim: sumCases intro: Sum1 Sum2)
lemma sumAssocLeft:
fixes P :: ccs
and Q :: ccs
and R :: ccs
assumes "Id ⊆ Rel"
shows "(P ⊕ Q) ⊕ R ↝[Rel] P ⊕ (Q ⊕ R)"
using assms
by(force simp add: simulation_def elim: sumCases intro: Sum1 Sum2)
lemma sumAssocRight:
fixes P :: ccs
and Q :: ccs
and R :: ccs
assumes "Id ⊆ Rel"
shows " P ⊕ (Q ⊕ R) ↝[Rel] (P ⊕ Q) ⊕ R"
using assms
by(intro simI, elim sumCases) (blast intro: Sum1 Sum2)+
lemma sumIdLeft:
fixes P :: ccs
and Rel :: "(ccs × ccs) set"
assumes "Id ⊆ Rel"
shows "P ⊕ 0 ↝[Rel] P"
using assms
by(auto simp add: simulation_def intro: Sum1)
lemma sumIdRight:
fixes P :: ccs
and Rel :: "(ccs × ccs) set"
assumes "Id ⊆ Rel"
shows "P ↝[Rel] P ⊕ 0"
using assms
by(fastforce simp add: simulation_def elim: sumCases)
lemma parComm:
fixes P :: ccs
and Q :: ccs
assumes C1: "∧R T. (R ∥ T, T ∥ R) ∈ Rel"
shows "P ∥ Q ↝[Rel] Q ∥ P"
by(fastforce simp add: simulation_def elim: parCases intro: Par1 Par2 Comm C1)
lemma parAssocLeft:
fixes P :: ccs
and Q :: ccs
and R :: ccs
assumes C1: "∧S T U. ((S ∥ T) ∥ U, S ∥ (T ∥ U)) ∈ Rel"
shows "(P ∥ Q) ∥ R ↝[Rel] P ∥ (Q ∥ R)"
by(fastforce simp add: simulation_def elim: parCases intro: Par1 Par2 Comm C1)
lemma parAssocRight:
fixes P :: ccs
and Q :: ccs
and R :: ccs
assumes C1: "∧S T U. (S ∥ (T ∥ U), (S ∥ T) ∥ U) ∈ Rel"
shows "P ∥ (Q ∥ R) ↝[Rel] (P ∥ Q) ∥ R"
by(fastforce simp add: simulation_def elim: parCases intro: Par1 Par2 Comm C1)
lemma parIdLeft:
fixes P :: ccs
and Rel :: "(ccs × ccs) set"
assumes "∧Q. (Q ∥ 0, Q) ∈ Rel"
shows "P ∥ 0 ↝[Rel] P"
using assms
by(auto simp add: simulation_def intro: Par1)
lemma parIdRight:
fixes P :: ccs
and Rel :: "(ccs × ccs) set"
assumes "∧Q. (Q, Q ∥ 0) ∈ Rel"
shows "P ↝[Rel] P ∥ 0"
using assms
by(fastforce simp add: simulation_def elim: parCases)
declare fresh_atm[simp]
lemma resActLeft:
fixes x :: name
and α :: act
and P :: ccs
assumes "x ♯ α"
and "Id ⊆ Rel"
shows "(νx)(α.(P)) ↝[Rel] (α.((νx)P))"
using assms
by(fastforce simp add: simulation_def elim: actCases intro: Res Action)
lemma resActRight:
fixes x :: name
and α :: act
and P :: ccs
assumes "x ♯ α"
and "Id ⊆ Rel"
shows "α.((νx)P) ↝[Rel] (νx)(α.(P))"
using assms
by(fastforce simp add: simulation_def elim: resCases actCases intro: Action)
lemma resComm:
fixes x :: name
and y :: name
and P :: ccs
assumes "∧Q. ((νx)((νy)Q), (νy)((νx)Q)) ∈ Rel"
shows "(νx)((νy)P) ↝[Rel] (νy)((νx)P)"
using assms
by(fastforce simp add: simulation_def elim: resCases intro: Res)
inductive_cases bangCases[simplified ccs.distinct act.distinct]: "!P ⟼α ≺ P'"
lemma bangUnfoldLeft:
fixes P :: ccs
assumes "Id ⊆ Rel"
shows "P ∥ !P ↝[Rel] !P"
using assms
by(fastforce simp add: simulation_def ccs.inject elim: bangCases)
lemma bangUnfoldRight:
fixes P :: ccs
assumes "Id ⊆ Rel"
shows "!P ↝[Rel] P ∥ !P"
using assms
by(fastforce simp add: simulation_def ccs.inject intro: Bang)
end
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