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Proof step 2 from proof eqds-sources-ipurge (conclusion)

⊦ eqds(sys, sources(cl, d), sys0) ↔ eqds(sys, sources(ipurge(cl, d), d), sys0)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ eqds(sys, sources(ipurge(cl, d), d), sys0) ↔ eqds(sys, sources(cl, d), sys0)

Rule argument

[x0lemmaarg: spec-name: instance-name: lemma-name: eqds-sources-ipurge-01 antecedent: succedent: eqds(sys, sources(ipurge(cl, d), d), sys0) ↔ eqds(sys, sources(cl, d), sys0) substlist: [sys0, d, cl, sys] → [sys0, d, cl, sys] add preconditions?: F is rewrite lemma?: T current spec?: T rotate lemma?: F replace all?: T paths: ((1, 0, 0, 1, 1)) dummy: () ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (sys0, d, cl, sys)]]