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Theorem shincli 29141
Description: Closure of intersection of two subspaces. (Contributed by NM, 19-Oct-1999.) (New usage is discouraged.)
Hypotheses
Ref Expression
shincl.1 𝐴S
shincl.2 𝐵S
Assertion
Ref Expression
shincli (𝐴𝐵) ∈ S

Proof of Theorem shincli
StepHypRef Expression
1 shincl.1 . . . 4 𝐴S
21elexi 3515 . . 3 𝐴 ∈ V
3 shincl.2 . . . 4 𝐵S
43elexi 3515 . . 3 𝐵 ∈ V
52, 4intpr 4911 . 2 {𝐴, 𝐵} = (𝐴𝐵)
61, 3pm3.2i 473 . . . . 5 (𝐴S𝐵S )
72, 4prss 4755 . . . . 5 ((𝐴S𝐵S ) ↔ {𝐴, 𝐵} ⊆ S )
86, 7mpbi 232 . . . 4 {𝐴, 𝐵} ⊆ S
92prnz 4714 . . . 4 {𝐴, 𝐵} ≠ ∅
108, 9pm3.2i 473 . . 3 ({𝐴, 𝐵} ⊆ S ∧ {𝐴, 𝐵} ≠ ∅)
1110shintcli 29108 . 2 {𝐴, 𝐵} ∈ S
125, 11eqeltrri 2912 1 (𝐴𝐵) ∈ S
Colors of variables: wff setvar class
Syntax hints:  wa 398  wcel 2114  wne 3018  cin 3937  wss 3938  c0 4293  {cpr 4571   cint 4878   S csh 28707
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pr 5332  ax-hilex 28778  ax-hfvadd 28779  ax-hv0cl 28782  ax-hfvmul 28784
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-ral 3145  df-rex 3146  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-int 4879  df-iun 4923  df-br 5069  df-opab 5131  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-fv 6365  df-ov 7161  df-sh 28986
This theorem is referenced by:  shincl  29160  shmodsi  29168  shmodi  29169  5oalem1  29433  5oalem3  29435  5oalem5  29437  5oalem6  29438  5oai  29440  3oalem2  29442  3oalem6  29446  cdj3lem1  30213
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