Theorem axsep 5244

Description: Axiom scheme of separation ax-sep 5245 derived from the axiom scheme of replacement ax-rep 5226. The statement is identical to that of ax-sep 5245, and therefore shows that ax-sep 5245 is redundant when ax-rep 5226 is allowed. See ax-sep 5245 for more information. (Contributed by NM, 11-Sep-2006.) Use ax-sep 5245 instead. (New usage is discouraged.)

Assertion

Ref	Expression
axsep	⊢ ∃𝑦∀𝑥(𝑥 ∈ 𝑦 ↔ (𝑥 ∈ 𝑧 ∧ 𝜑))

Distinct variable groups:   𝑥,𝑦,𝑧   𝜑,𝑦,𝑧

Allowed substitution hint:   𝜑(𝑥)

Proof of Theorem axsep

Step	Hyp	Ref	Expression
1		axsepgfromrep 5243	1 ⊢ ∃𝑦∀𝑥(𝑥 ∈ 𝑦 ↔ (𝑥 ∈ 𝑧 ∧ 𝜑))

Syntax hints:   ↔ wb 208   ∧ wa 399  ∀wal 1557  ∃wex 1798

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-rep 5226

This theorem depends on definitions:  df-bi 209  df-an 400  df-ex 1799  df-mo 2565  df-eu 2595  df-rex 3086

This theorem is referenced by: (None)