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Theorem grupr 10290
Description: A Grothendieck universe contains pairs derived from its elements. (Contributed by Mario Carneiro, 9-Jun-2013.)
Assertion
Ref Expression
grupr ((𝑈 ∈ Univ ∧ 𝐴𝑈𝐵𝑈) → {𝐴, 𝐵} ∈ 𝑈)

Proof of Theorem grupr
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elgrug 10285 . . . . . . 7 (𝑈 ∈ Univ → (𝑈 ∈ Univ ↔ (Tr 𝑈 ∧ ∀𝑥𝑈 (𝒫 𝑥𝑈 ∧ ∀𝑦𝑈 {𝑥, 𝑦} ∈ 𝑈 ∧ ∀𝑦 ∈ (𝑈m 𝑥) ran 𝑦𝑈))))
21ibi 270 . . . . . 6 (𝑈 ∈ Univ → (Tr 𝑈 ∧ ∀𝑥𝑈 (𝒫 𝑥𝑈 ∧ ∀𝑦𝑈 {𝑥, 𝑦} ∈ 𝑈 ∧ ∀𝑦 ∈ (𝑈m 𝑥) ran 𝑦𝑈)))
32simprd 499 . . . . 5 (𝑈 ∈ Univ → ∀𝑥𝑈 (𝒫 𝑥𝑈 ∧ ∀𝑦𝑈 {𝑥, 𝑦} ∈ 𝑈 ∧ ∀𝑦 ∈ (𝑈m 𝑥) ran 𝑦𝑈))
4 preq2 4622 . . . . . . . . . 10 (𝑦 = 𝐵 → {𝑥, 𝑦} = {𝑥, 𝐵})
54eleq1d 2817 . . . . . . . . 9 (𝑦 = 𝐵 → ({𝑥, 𝑦} ∈ 𝑈 ↔ {𝑥, 𝐵} ∈ 𝑈))
65rspccv 3521 . . . . . . . 8 (∀𝑦𝑈 {𝑥, 𝑦} ∈ 𝑈 → (𝐵𝑈 → {𝑥, 𝐵} ∈ 𝑈))
763ad2ant2 1135 . . . . . . 7 ((𝒫 𝑥𝑈 ∧ ∀𝑦𝑈 {𝑥, 𝑦} ∈ 𝑈 ∧ ∀𝑦 ∈ (𝑈m 𝑥) ran 𝑦𝑈) → (𝐵𝑈 → {𝑥, 𝐵} ∈ 𝑈))
87com12 32 . . . . . 6 (𝐵𝑈 → ((𝒫 𝑥𝑈 ∧ ∀𝑦𝑈 {𝑥, 𝑦} ∈ 𝑈 ∧ ∀𝑦 ∈ (𝑈m 𝑥) ran 𝑦𝑈) → {𝑥, 𝐵} ∈ 𝑈))
98ralimdv 3092 . . . . 5 (𝐵𝑈 → (∀𝑥𝑈 (𝒫 𝑥𝑈 ∧ ∀𝑦𝑈 {𝑥, 𝑦} ∈ 𝑈 ∧ ∀𝑦 ∈ (𝑈m 𝑥) ran 𝑦𝑈) → ∀𝑥𝑈 {𝑥, 𝐵} ∈ 𝑈))
103, 9syl5com 31 . . . 4 (𝑈 ∈ Univ → (𝐵𝑈 → ∀𝑥𝑈 {𝑥, 𝐵} ∈ 𝑈))
11 preq1 4621 . . . . . 6 (𝑥 = 𝐴 → {𝑥, 𝐵} = {𝐴, 𝐵})
1211eleq1d 2817 . . . . 5 (𝑥 = 𝐴 → ({𝑥, 𝐵} ∈ 𝑈 ↔ {𝐴, 𝐵} ∈ 𝑈))
1312rspccv 3521 . . . 4 (∀𝑥𝑈 {𝑥, 𝐵} ∈ 𝑈 → (𝐴𝑈 → {𝐴, 𝐵} ∈ 𝑈))
1410, 13syl6 35 . . 3 (𝑈 ∈ Univ → (𝐵𝑈 → (𝐴𝑈 → {𝐴, 𝐵} ∈ 𝑈)))
1514com23 86 . 2 (𝑈 ∈ Univ → (𝐴𝑈 → (𝐵𝑈 → {𝐴, 𝐵} ∈ 𝑈)))
16153imp 1112 1 ((𝑈 ∈ Univ ∧ 𝐴𝑈𝐵𝑈) → {𝐴, 𝐵} ∈ 𝑈)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399  w3a 1088   = wceq 1542  wcel 2113  wral 3053  𝒫 cpw 4485  {cpr 4515   cuni 4793  Tr wtr 5133  ran crn 5520  (class class class)co 7164  m cmap 8430  Univcgru 10283
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1916  ax-6 1974  ax-7 2019  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2161  ax-12 2178  ax-ext 2710
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 847  df-3an 1090  df-tru 1545  df-ex 1787  df-nf 1791  df-sb 2074  df-clab 2717  df-cleq 2730  df-clel 2811  df-nfc 2881  df-ral 3058  df-v 3399  df-un 3846  df-in 3848  df-ss 3858  df-sn 4514  df-pr 4516  df-op 4520  df-uni 4794  df-br 5028  df-tr 5134  df-iota 6291  df-fv 6341  df-ov 7167  df-gru 10284
This theorem is referenced by:  grusn  10297  gruop  10298  gruun  10299  gruwun  10306  intgru  10307
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