Theorem elmptrab2 21849

Description: Membership in a one-parameter class of sets, indexed by arbitrary base sets. (Contributed by Stefan O'Rear, 28-Jul-2015.) (Revised by AV, 26-Mar-2021.)

Hypotheses

Ref	Expression
elmptrab2.f	⊢ 𝐹 = (𝑥 ∈ V ↦ {𝑦 ∈ 𝐵 ∣ 𝜑})
elmptrab2.s1	⊢ ((𝑥 = 𝑋 ∧ 𝑦 = 𝑌) → (𝜑 ↔ 𝜓))
elmptrab2.s2	⊢ (𝑥 = 𝑋 → 𝐵 = 𝐶)
elmptrab2.ex	⊢ 𝐵 ∈ V
elmptrab2.rc	⊢ (𝑌 ∈ 𝐶 → 𝑋 ∈ 𝑊)

Assertion

Ref	Expression
elmptrab2	⊢ (𝑌 ∈ (𝐹‘𝑋) ↔ (𝑌 ∈ 𝐶 ∧ 𝜓))

Distinct variable groups:   𝑥,𝑦,𝜓   𝑥,𝑋,𝑦   𝑥,𝑌,𝑦   𝑥,𝐶,𝑦   𝑥,𝑊,𝑦   𝑦,𝐵

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

Proof of Theorem elmptrab2

Step	Hyp	Ref	Expression
1		elmptrab2.f	. . 3 ⊢ 𝐹 = (𝑥 ∈ V ↦ {𝑦 ∈ 𝐵 ∣ 𝜑})
2		elmptrab2.s1	. . 3 ⊢ ((𝑥 = 𝑋 ∧ 𝑦 = 𝑌) → (𝜑 ↔ 𝜓))
3		elmptrab2.s2	. . 3 ⊢ (𝑥 = 𝑋 → 𝐵 = 𝐶)
4		elmptrab2.ex	. . . 4 ⊢ 𝐵 ∈ V
5	4	a1i 11	. . 3 ⊢ (𝑥 ∈ V → 𝐵 ∈ V)
6	1, 2, 3, 5	elmptrab 21848	. 2 ⊢ (𝑌 ∈ (𝐹‘𝑋) ↔ (𝑋 ∈ V ∧ 𝑌 ∈ 𝐶 ∧ 𝜓))
7		3simpc 1175	. . 3 ⊢ ((𝑋 ∈ V ∧ 𝑌 ∈ 𝐶 ∧ 𝜓) → (𝑌 ∈ 𝐶 ∧ 𝜓))
8		elmptrab2.rc	. . . . . 6 ⊢ (𝑌 ∈ 𝐶 → 𝑋 ∈ 𝑊)
9		elex 3413	. . . . . 6 ⊢ (𝑋 ∈ 𝑊 → 𝑋 ∈ V)
10	8, 9	syl 17	. . . . 5 ⊢ (𝑌 ∈ 𝐶 → 𝑋 ∈ V)
11	10	adantr 468	. . . 4 ⊢ ((𝑌 ∈ 𝐶 ∧ 𝜓) → 𝑋 ∈ V)
12		simpl 470	. . . 4 ⊢ ((𝑌 ∈ 𝐶 ∧ 𝜓) → 𝑌 ∈ 𝐶)
13		simpr 473	. . . 4 ⊢ ((𝑌 ∈ 𝐶 ∧ 𝜓) → 𝜓)
14	11, 12, 13	3jca 1151	. . 3 ⊢ ((𝑌 ∈ 𝐶 ∧ 𝜓) → (𝑋 ∈ V ∧ 𝑌 ∈ 𝐶 ∧ 𝜓))
15	7, 14	impbii 200	. 2 ⊢ ((𝑋 ∈ V ∧ 𝑌 ∈ 𝐶 ∧ 𝜓) ↔ (𝑌 ∈ 𝐶 ∧ 𝜓))
16	6, 15	bitri 266	1 ⊢ (𝑌 ∈ (𝐹‘𝑋) ↔ (𝑌 ∈ 𝐶 ∧ 𝜓))

Syntax hints:   → wi 4   ↔ wb 197   ∧ wa 384   ∧ w3a 1100   = wceq 1637   ∈ wcel 2157  {crab 3107  Vcvv 3398   ↦ cmpt 4930  ‘cfv 6104

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1877  ax-4 1894  ax-5 2001  ax-6 2069  ax-7 2105  ax-8 2159  ax-9 2166  ax-10 2186  ax-11 2202  ax-12 2215  ax-13 2422  ax-ext 2791  ax-sep 4982  ax-nul 4990  ax-pow 5042  ax-pr 5103

This theorem depends on definitions:  df-bi 198  df-an 385  df-or 866  df-3an 1102  df-tru 1641  df-ex 1860  df-nf 1864  df-sb 2062  df-mo 2635  df-eu 2638  df-clab 2800  df-cleq 2806  df-clel 2809  df-nfc 2944  df-ral 3108  df-rex 3109  df-rab 3112  df-v 3400  df-sbc 3641  df-csb 3736  df-dif 3779  df-un 3781  df-in 3783  df-ss 3790  df-nul 4124  df-if 4287  df-sn 4378  df-pr 4380  df-op 4384  df-uni 4638  df-br 4852  df-opab 4914  df-mpt 4931  df-id 5226  df-xp 5324  df-rel 5325  df-cnv 5326  df-co 5327  df-dm 5328  df-rn 5329  df-res 5330  df-ima 5331  df-iota 6067  df-fun 6106  df-fv 6112

This theorem is referenced by:  isfil  21868  isufil  21924