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Theorem base for Specification set-nogen-basic

This is a listing of all goals defined over the current specification. Axioms are yellow, proof obligations purple and theorems green. Click on individual names to get more information on the proof.

Name:	Sequent:	Type:
Extension	⊦ sng1 = sng2 ↔ (∀ a. a ∈ sng1 ↔ a ∈ sng2)	An Axiom
In-empty	⊦ ¬ a ∈ ∅	An Axiom
In-insert	⊦ a ∈ sng ++ b ↔ a = b ∨ a ∈ sng	An Axiom
Subset	⊦ sng1 ⊆ sng2 ↔ (∀ a. a ∈ sng1 → a ∈ sng2)	An Axiom