Theorem sprssspr 47355

Description: The set of all unordered pairs over a given set 𝑉 is a subset of the set of all unordered pairs. (Contributed by AV, 21-Nov-2021.)

Assertion

Ref	Expression
sprssspr	⊢ (Pairs‘𝑉) ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}}

Distinct variable group:   𝑉,𝑎,𝑏,𝑝

Proof of Theorem sprssspr

Step	Hyp	Ref	Expression
1		sprval 47353	. . 3 ⊢ (𝑉 ∈ V → (Pairs‘𝑉) = {𝑝 ∣ ∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏}})
2		r2ex 3202	. . . . . . 7 ⊢ (∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏} ↔ ∃𝑎∃𝑏((𝑎 ∈ 𝑉 ∧ 𝑏 ∈ 𝑉) ∧ 𝑝 = {𝑎, 𝑏}))
3		simpr 484	. . . . . . . 8 ⊢ (((𝑎 ∈ 𝑉 ∧ 𝑏 ∈ 𝑉) ∧ 𝑝 = {𝑎, 𝑏}) → 𝑝 = {𝑎, 𝑏})
4	3	2eximi 1834	. . . . . . 7 ⊢ (∃𝑎∃𝑏((𝑎 ∈ 𝑉 ∧ 𝑏 ∈ 𝑉) ∧ 𝑝 = {𝑎, 𝑏}) → ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏})
5	2, 4	sylbi 217	. . . . . 6 ⊢ (∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏} → ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏})
6	5	ax-gen 1793	. . . . 5 ⊢ ∀𝑝(∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏} → ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏})
7	6	a1i 11	. . . 4 ⊢ (𝑉 ∈ V → ∀𝑝(∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏} → ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}))
8		ss2ab 4085	. . . 4 ⊢ ({𝑝 ∣ ∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏}} ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}} ↔ ∀𝑝(∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏} → ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}))
9	7, 8	sylibr 234	. . 3 ⊢ (𝑉 ∈ V → {𝑝 ∣ ∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏}} ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}})
10	1, 9	eqsstrd 4047	. 2 ⊢ (𝑉 ∈ V → (Pairs‘𝑉) ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}})
11		fvprc 6912	. . 3 ⊢ (¬ 𝑉 ∈ V → (Pairs‘𝑉) = ∅)
12		0ss 4423	. . . 4 ⊢ ∅ ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}}
13	12	a1i 11	. . 3 ⊢ (¬ 𝑉 ∈ V → ∅ ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}})
14	11, 13	eqsstrd 4047	. 2 ⊢ (¬ 𝑉 ∈ V → (Pairs‘𝑉) ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}})
15	10, 14	pm2.61i 182	1 ⊢ (Pairs‘𝑉) ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}}

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 395  ∀wal 1535   = wceq 1537  ∃wex 1777   ∈ wcel 2108  {cab 2717  ∃wrex 3076  Vcvv 3488   ⊆ wss 3976  ∅c0 4352  {cpr 4650  ‘cfv 6573  Pairscspr 47351

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-rep 5303  ax-sep 5317  ax-nul 5324  ax-pr 5447  ax-un 7770

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ral 3068  df-rex 3077  df-rab 3444  df-v 3490  df-sbc 3805  df-csb 3922  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-iun 5017  df-br 5167  df-opab 5229  df-mpt 5250  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-iota 6525  df-fun 6575  df-fv 6581  df-spr 47352

This theorem is referenced by:  spr0el  47356