Theorem ax12or 1506

Description: Alias for ax-i12 1505, to be used in place of it for labeling consistency. (Contributed by NM, 3-Feb-2015.)

Assertion

Ref	Expression
ax12or	⊢ (∀𝑧 𝑧 = 𝑥 ∨ (∀𝑧 𝑧 = 𝑦 ∨ ∀𝑧(𝑥 = 𝑦 → ∀𝑧 𝑥 = 𝑦)))

Proof of Theorem ax12or

Step	Hyp	Ref	Expression
1		ax-i12 1505	1 ⊢ (∀𝑧 𝑧 = 𝑥 ∨ (∀𝑧 𝑧 = 𝑦 ∨ ∀𝑧(𝑥 = 𝑦 → ∀𝑧 𝑥 = 𝑦)))

Syntax hints:   → wi 4   ∨ wo 708  ∀wal 1351

This theorem was proved from axioms:  ax-i12 1505

This theorem is referenced by:  ax12  1510  hbequid  1511  hbae  1716  equvini  1756  equveli  1757  dveeq2  1813  dveeq2or  1814  dvelimALT  2008  dvelimfv  2009