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Theorem iscnrm3lem2 50042
Description: Lemma for iscnrm3 50059 proving a biconditional on restricted universal quantifications. (Contributed by Zhi Wang, 3-Sep-2024.)
Hypotheses
Ref Expression
iscnrm3lem2.1 (𝜑 → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐶 𝜓 → ((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒)))
iscnrm3lem2.2 (𝜑 → (∀𝑤 ∈ 𝐷 ∀𝑣 ∈ 𝐸 𝜒 → ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓)))
Assertion
Ref Expression
iscnrm3lem2 (𝜑 → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐶 𝜓 ↔ ∀𝑤 ∈ 𝐷 ∀𝑣 ∈ 𝐸 𝜒))
Distinct variable groups:   𝑣,𝐴,𝑤,𝑦,𝑧   𝑣,𝐵,𝑤,𝑧   𝑣,𝐶,𝑤   𝑣,𝐷,𝑥,𝑦,𝑧   𝑥,𝐸,𝑦,𝑧   𝜒,𝑥,𝑦,𝑧   𝜑,𝑣,𝑤,𝑥,𝑦,𝑧   𝜓,𝑣,𝑤
Allowed substitution hints:   𝜓(𝑥, 𝑦, 𝑧)   𝜒(𝑤, 𝑣)   𝐴(𝑥)   𝐵(𝑥, 𝑦)   𝐶(𝑥, 𝑦, 𝑧)   𝐷(𝑤)   𝐸(𝑤, 𝑣)

Proof of Theorem iscnrm3lem2
StepHypRef Expression
1 2ax5 1970 . . . 4 (∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓) → ∀𝑤∀𝑣∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓))
2 r3al 3201 . . . . . 6 (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐶 𝜓 ↔ ∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓))
3 iscnrm3lem2.1 . . . . . 6 (𝜑 → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐶 𝜓 → ((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒)))
42, 3biimtrrid 246 . . . . 5 (𝜑 → (∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓) → ((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒)))
542alimdv 1951 . . . 4 (𝜑 → (∀𝑤∀𝑣∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓) → ∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒)))
61, 5syl5 35 . . 3 (𝜑 → (∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓) → ∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒)))
7 2ax5 1970 . . . . 5 (∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒) → ∀𝑦∀𝑧∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒))
87alrimiv 1960 . . . 4 (∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒) → ∀𝑥∀𝑦∀𝑧∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒))
9 r2al 3199 . . . . . . 7 (∀𝑤 ∈ 𝐷 ∀𝑣 ∈ 𝐸 𝜒 ↔ ∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒))
10 iscnrm3lem2.2 . . . . . . 7 (𝜑 → (∀𝑤 ∈ 𝐷 ∀𝑣 ∈ 𝐸 𝜒 → ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓)))
119, 10biimtrrid 246 . . . . . 6 (𝜑 → (∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒) → ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓)))
12112alimdv 1951 . . . . 5 (𝜑 → (∀𝑦∀𝑧∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒) → ∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓)))
1312alimdv 1949 . . . 4 (𝜑 → (∀𝑥∀𝑦∀𝑧∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒) → ∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓)))
148, 13syl5 35 . . 3 (𝜑 → (∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒) → ∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓)))
156, 14impbid 215 . 2 (𝜑 → (∀𝑥∀𝑦∀𝑧((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐶) → 𝜓) ↔ ∀𝑤∀𝑣((𝑤 ∈ 𝐷 ∧ 𝑣 ∈ 𝐸) → 𝜒)))
1615, 2, 93bitr4g 317 1 (𝜑 → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐶 𝜓 ↔ ∀𝑤 ∈ 𝐷 ∀𝑣 ∈ 𝐸 𝜒))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   ∧ w3a 1103  ∀wal 1568   ∈ wcel 2145  ∀wral 3077
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 1943
This proof depends on definitions:  df-bi 210  df-an 402  df-3an 1105  df-ex 1813  df-ral 3078
This theorem is used by:  iscnrm3  50059
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