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Theorem shincli 28221
Description: Closure of intersection of two subspaces. (Contributed by NM, 19-Oct-1999.) (New usage is discouraged.)
Hypotheses
Ref Expression
shincl.1  |-  A  e.  SH
shincl.2  |-  B  e.  SH
Assertion
Ref Expression
shincli  |-  ( A  i^i  B )  e.  SH

Proof of Theorem shincli
StepHypRef Expression
1 shincl.1 . . . 4  |-  A  e.  SH
21elexi 3213 . . 3  |-  A  e. 
_V
3 shincl.2 . . . 4  |-  B  e.  SH
43elexi 3213 . . 3  |-  B  e. 
_V
52, 4intpr 4510 . 2  |-  |^| { A ,  B }  =  ( A  i^i  B )
61, 3pm3.2i 471 . . . . 5  |-  ( A  e.  SH  /\  B  e.  SH )
72, 4prss 4351 . . . . 5  |-  ( ( A  e.  SH  /\  B  e.  SH )  <->  { A ,  B }  C_  SH )
86, 7mpbi 220 . . . 4  |-  { A ,  B }  C_  SH
92prnz 4310 . . . 4  |-  { A ,  B }  =/=  (/)
108, 9pm3.2i 471 . . 3  |-  ( { A ,  B }  C_  SH  /\  { A ,  B }  =/=  (/) )
1110shintcli 28188 . 2  |-  |^| { A ,  B }  e.  SH
125, 11eqeltrri 2698 1  |-  ( A  i^i  B )  e.  SH
Colors of variables: wff setvar class
Syntax hints:    /\ wa 384    e. wcel 1990    =/= wne 2794    i^i cin 3573    C_ wss 3574   (/)c0 3915   {cpr 4179   |^|cint 4475   SHcsh 27785
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906  ax-hilex 27856  ax-hfvadd 27857  ax-hv0cl 27860  ax-hfvmul 27862
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-fv 5896  df-ov 6653  df-sh 28064
This theorem is referenced by:  shincl  28240  shmodsi  28248  shmodi  28249  5oalem1  28513  5oalem3  28515  5oalem5  28517  5oalem6  28518  5oai  28520  3oalem2  28522  3oalem6  28526  cdj3lem1  29293
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