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Theorem chm1i 30401
Description: Meet with lattice one in C. (Contributed by NM, 24-Oct-1999.) (New usage is discouraged.)
Hypothesis
Ref Expression
ch0le.1 𝐴C
Assertion
Ref Expression
chm1i (𝐴 ∩ ℋ) = 𝐴

Proof of Theorem chm1i
StepHypRef Expression
1 ch0le.1 . . 3 𝐴C
21chssii 30176 . 2 𝐴 ⊆ ℋ
3 df-ss 3928 . 2 (𝐴 ⊆ ℋ ↔ (𝐴 ∩ ℋ) = 𝐴)
42, 3mpbi 229 1 (𝐴 ∩ ℋ) = 𝐴
Colors of variables: wff setvar class
Syntax hints:   = wceq 1542  wcel 2107  cin 3910  wss 3911  chba 29864   C cch 29874
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-ext 2708  ax-sep 5257  ax-hilex 29944
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-sb 2069  df-clab 2715  df-cleq 2729  df-clel 2815  df-rab 3409  df-v 3448  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4284  df-if 4488  df-pw 4563  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4867  df-br 5107  df-opab 5169  df-xp 5640  df-cnv 5642  df-dm 5644  df-rn 5645  df-res 5646  df-ima 5647  df-iota 6449  df-fv 6505  df-ov 7361  df-sh 30152  df-ch 30166
This theorem is referenced by:  stcltrlem1  31221
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