Theorem sprssspr 47941

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 47939	. . 3 ⊢ (𝑉 ∈ V → (Pairs‘𝑉) = {𝑝 ∣ ∃𝑎 ∈ 𝑉 ∃𝑏 ∈ 𝑉 𝑝 = {𝑎, 𝑏}})
2		r2ex 3174	. . . . . . 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 1838	. . . . . . 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 1797	. . . . 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 4001	. . . 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 3956	. 2 ⊢ (𝑉 ∈ V → (Pairs‘𝑉) ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}})
11		fvprc 6832	. . 3 ⊢ (¬ 𝑉 ∈ V → (Pairs‘𝑉) = ∅)
12		0ss 4340	. . . 4 ⊢ ∅ ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}}
13	12	a1i 11	. . 3 ⊢ (¬ 𝑉 ∈ V → ∅ ⊆ {𝑝 ∣ ∃𝑎∃𝑏 𝑝 = {𝑎, 𝑏}})
14	11, 13	eqsstrd 3956	. 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 1540   = wceq 1542  ∃wex 1781   ∈ wcel 2114  {cab 2714  ∃wrex 3061  Vcvv 3429   ⊆ wss 3889  ∅c0 4273  {cpr 4569  ‘cfv 6498  Pairscspr 47937

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-rep 5212  ax-sep 5231  ax-nul 5241  ax-pr 5375  ax-un 7689

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3062  df-rab 3390  df-v 3431  df-sbc 3729  df-csb 3838  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-nul 4274  df-if 4467  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-iun 4935  df-br 5086  df-opab 5148  df-mpt 5167  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-iota 6454  df-fun 6500  df-fv 6506  df-spr 47938

This theorem is referenced by:  spr0el  47942