Theorem setsnidel 47983

Description: The injected slot is an element of the structure with replacement. (Contributed by AV, 10-Nov-2021.)

Hypotheses

Ref	Expression
setsidel.s	⊢ (𝜑 → 𝑆 ∈ 𝑉)
setsidel.b	⊢ (𝜑 → 𝐵 ∈ 𝑊)
setsidel.r	⊢ 𝑅 = (𝑆 sSet ⟨𝐴, 𝐵⟩)
setsnidel.c	⊢ (𝜑 → 𝐶 ∈ 𝑋)
setsnidel.d	⊢ (𝜑 → 𝐷 ∈ 𝑌)
setsnidel.s	⊢ (𝜑 → ⟨𝐶, 𝐷⟩ ∈ 𝑆)
setsnidel.n	⊢ (𝜑 → 𝐴 ≠ 𝐶)

Assertion

Ref	Expression
setsnidel	⊢ (𝜑 → ⟨𝐶, 𝐷⟩ ∈ 𝑅)

Proof of Theorem setsnidel

Step	Hyp	Ref	Expression
1		setsnidel.c	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ 𝑋)
2	1	elexd 3477	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ V)
3		setsnidel.n	. . . . . 6 ⊢ (𝜑 → 𝐴 ≠ 𝐶)
4	3	necomd 3012	. . . . 5 ⊢ (𝜑 → 𝐶 ≠ 𝐴)
5		eldifsn 4746	. . . . 5 ⊢ (𝐶 ∈ (V ∖ {𝐴}) ↔ (𝐶 ∈ V ∧ 𝐶 ≠ 𝐴))
6	2, 4, 5	sylanbrc 592	. . . 4 ⊢ (𝜑 → 𝐶 ∈ (V ∖ {𝐴}))
7		setsnidel.s	. . . 4 ⊢ (𝜑 → ⟨𝐶, 𝐷⟩ ∈ 𝑆)
8		setsnidel.d	. . . . 5 ⊢ (𝜑 → 𝐷 ∈ 𝑌)
9		opelres 5971	. . . . 5 ⊢ (𝐷 ∈ 𝑌 → (⟨𝐶, 𝐷⟩ ∈ (𝑆 ↾ (V ∖ {𝐴})) ↔ (𝐶 ∈ (V ∖ {𝐴}) ∧ ⟨𝐶, 𝐷⟩ ∈ 𝑆)))
10	8, 9	syl 17	. . . 4 ⊢ (𝜑 → (⟨𝐶, 𝐷⟩ ∈ (𝑆 ↾ (V ∖ {𝐴})) ↔ (𝐶 ∈ (V ∖ {𝐴}) ∧ ⟨𝐶, 𝐷⟩ ∈ 𝑆)))
11	6, 7, 10	mpbir2and 723	. . 3 ⊢ (𝜑 → ⟨𝐶, 𝐷⟩ ∈ (𝑆 ↾ (V ∖ {𝐴})))
12		elun1 4134	. . 3 ⊢ (⟨𝐶, 𝐷⟩ ∈ (𝑆 ↾ (V ∖ {𝐴})) → ⟨𝐶, 𝐷⟩ ∈ ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐵⟩}))
13	11, 12	syl 17	. 2 ⊢ (𝜑 → ⟨𝐶, 𝐷⟩ ∈ ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐵⟩}))
14		setsidel.r	. . 3 ⊢ 𝑅 = (𝑆 sSet ⟨𝐴, 𝐵⟩)
15		setsidel.s	. . . 4 ⊢ (𝜑 → 𝑆 ∈ 𝑉)
16		setsidel.b	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑊)
17		setsval 17203	. . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝑆 sSet ⟨𝐴, 𝐵⟩) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐵⟩}))
18	15, 16, 17	syl2anc 593	. . 3 ⊢ (𝜑 → (𝑆 sSet ⟨𝐴, 𝐵⟩) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐵⟩}))
19	14, 18	eqtrid 2809	. 2 ⊢ (𝜑 → 𝑅 = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐵⟩}))
20	13, 19	eleqtrrd 2865	1 ⊢ (𝜑 → ⟨𝐶, 𝐷⟩ ∈ 𝑅)

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 399   = wceq 1560   ∈ wcel 2142   ≠ wne 2957  Vcvv 3454   ∖ cdif 3901   ∪ cun 3902  {csn 4582  ⟨cop 4588   ↾ cres 5649  (class class class)co 7396   sSet csts 17199

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-sep 5246  ax-pr 5390  ax-un 7718

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-nf 1804  df-sb 2091  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3077  df-rex 3087  df-rab 3415  df-v 3456  df-sbc 3745  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4481  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-id 5542  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-res 5659  df-iota 6477  df-fun 6523  df-fv 6529  df-ov 7399  df-oprab 7400  df-mpo 7401  df-sets 17200

This theorem is referenced by: (None)