Theorem ralrmo3 39487

Description: Pull a restricted universal quantifier into the body (for ∃*). (Contributed by Peter Mazsa, 9-May-2019.)

Assertion

Ref	Expression
ralrmo3	⊢ (∀𝑦 ∈ 𝐵 ∃*𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑦∃*𝑥 ∈ 𝐴 (𝑦 ∈ 𝐵 ∧ 𝜑))

Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝑦

Allowed substitution hints:   𝜑(𝑥, 𝑦)   𝐴(𝑦)   𝐵(𝑦)

Proof of Theorem ralrmo3

Step	Hyp	Ref	Expression
1		df-ral 3081	. 2 ⊢ (∀𝑦 ∈ 𝐵 ∃*𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑦(𝑦 ∈ 𝐵 → ∃*𝑥 ∈ 𝐴 𝜑))
2		nfv 1949	. . . 4 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐵
3	2	rmoanim 3846	. . 3 ⊢ (∃*𝑥 ∈ 𝐴 (𝑦 ∈ 𝐵 ∧ 𝜑) ↔ (𝑦 ∈ 𝐵 → ∃*𝑥 ∈ 𝐴 𝜑))
4	3	albii 1852	. 2 ⊢ (∀𝑦∃*𝑥 ∈ 𝐴 (𝑦 ∈ 𝐵 ∧ 𝜑) ↔ ∀𝑦(𝑦 ∈ 𝐵 → ∃*𝑥 ∈ 𝐴 𝜑))
5	1, 4	bitr4i 281	1 ⊢ (∀𝑦 ∈ 𝐵 ∃*𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑦∃*𝑥 ∈ 𝐴 (𝑦 ∈ 𝐵 ∧ 𝜑))

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401  ∀wal 1568   ∈ wcel 2147  ∀wral 3080  ∃*wrmo 3368

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-12 2216

This proof depends on definitions:  df-bi 210  df-an 402  df-ex 1813  df-nf 1817  df-mo 2567  df-ral 3081  df-rmo 3369

This theorem is used by:  raldmqseu  39488