Theorem relelbasov 13264

Description: Utility theorem: reverse closure for any structure defined as a two-argument function. (Contributed by Mario Carneiro, 3-Oct-2015.)

Hypotheses

Ref	Expression
elbasov.o	⊢ Rel dom 𝑂
relelbasov.r	⊢ Rel 𝑂
elbasov.s	⊢ 𝑆 = (𝑋𝑂𝑌)
elbasov.b	⊢ 𝐵 = (Base‘𝑆)

Assertion

Ref	Expression
relelbasov	⊢ (𝐴 ∈ 𝐵 → (𝑋 ∈ V ∧ 𝑌 ∈ V))

Proof of Theorem relelbasov

Dummy variable 𝑗 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elbasov.b	. . 3 ⊢ 𝐵 = (Base‘𝑆)
2	1	basm 13263	. 2 ⊢ (𝐴 ∈ 𝐵 → ∃𝑗 𝑗 ∈ 𝑆)
3		elbasov.o	. . . . 5 ⊢ Rel dom 𝑂
4		df-rel 4755	. . . . 5 ⊢ (Rel dom 𝑂 ↔ dom 𝑂 ⊆ (V × V))
5	3, 4	mpbi 145	. . . 4 ⊢ dom 𝑂 ⊆ (V × V)
6		relelbasov.r	. . . . 5 ⊢ Rel 𝑂
7		simpr 110	. . . . . . 7 ⊢ ((𝐴 ∈ 𝐵 ∧ 𝑗 ∈ 𝑆) → 𝑗 ∈ 𝑆)
8		elbasov.s	. . . . . . 7 ⊢ 𝑆 = (𝑋𝑂𝑌)
9	7, 8	eleqtrdi 2325	. . . . . 6 ⊢ ((𝐴 ∈ 𝐵 ∧ 𝑗 ∈ 𝑆) → 𝑗 ∈ (𝑋𝑂𝑌))
10		df-ov 6052	. . . . . 6 ⊢ (𝑋𝑂𝑌) = (𝑂‘⟨𝑋, 𝑌⟩)
11	9, 10	eleqtrdi 2325	. . . . 5 ⊢ ((𝐴 ∈ 𝐵 ∧ 𝑗 ∈ 𝑆) → 𝑗 ∈ (𝑂‘⟨𝑋, 𝑌⟩))
12		relelfvdm 5701	. . . . 5 ⊢ ((Rel 𝑂 ∧ 𝑗 ∈ (𝑂‘⟨𝑋, 𝑌⟩)) → ⟨𝑋, 𝑌⟩ ∈ dom 𝑂)
13	6, 11, 12	sylancr 414	. . . 4 ⊢ ((𝐴 ∈ 𝐵 ∧ 𝑗 ∈ 𝑆) → ⟨𝑋, 𝑌⟩ ∈ dom 𝑂)
14	5, 13	sselid 3235	. . 3 ⊢ ((𝐴 ∈ 𝐵 ∧ 𝑗 ∈ 𝑆) → ⟨𝑋, 𝑌⟩ ∈ (V × V))
15		opelxp 4778	. . 3 ⊢ (⟨𝑋, 𝑌⟩ ∈ (V × V) ↔ (𝑋 ∈ V ∧ 𝑌 ∈ V))
16	14, 15	sylib 122	. 2 ⊢ ((𝐴 ∈ 𝐵 ∧ 𝑗 ∈ 𝑆) → (𝑋 ∈ V ∧ 𝑌 ∈ V))
17	2, 16	exlimddv 1948	1 ⊢ (𝐴 ∈ 𝐵 → (𝑋 ∈ V ∧ 𝑌 ∈ V))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1398   ∈ wcel 2203  Vcvv 2812   ⊆ wss 3210  ⟨cop 3691   × cxp 4746  dom cdm 4748  Rel wrel 4753  ‘cfv 5351  (class class class)co 6049  Basecbs 13201

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-cnex 8214  ax-resscn 8215  ax-1re 8217  ax-addrcl 8220

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2814  df-sbc 3042  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-br 4109  df-opab 4171  df-mpt 4172  df-id 4413  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-iota 5311  df-fun 5353  df-fn 5354  df-fv 5359  df-ov 6052  df-inn 9234  df-ndx 13204  df-slot 13205  df-base 13207

This theorem is referenced by:  psrelbas  14817  psradd  14821  psraddcl  14822  mplrcl  14836  mplbasss  14838  mpladd  14846