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Theorem paddunssN 33444
Description: Projective subspace sum includes the set union of its arguments. (Contributed by NM, 12-Jan-2012.) (New usage is discouraged.)
Hypotheses
Ref Expression
padd0.a  |-  A  =  ( Atoms `  K )
padd0.p  |-  .+  =  ( +P `  K
)
Assertion
Ref Expression
paddunssN  |-  ( ( K  e.  B  /\  X  C_  A  /\  Y  C_  A )  ->  ( X  u.  Y )  C_  ( X  .+  Y
) )

Proof of Theorem paddunssN
Dummy variables  q  p  r are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ssun1 3588 . 2  |-  ( X  u.  Y )  C_  ( ( X  u.  Y )  u.  {
p  e.  A  |  E. q  e.  X  E. r  e.  Y  p ( le `  K ) ( q ( join `  K
) r ) } )
2 eqid 2471 . . 3  |-  ( le
`  K )  =  ( le `  K
)
3 eqid 2471 . . 3  |-  ( join `  K )  =  (
join `  K )
4 padd0.a . . 3  |-  A  =  ( Atoms `  K )
5 padd0.p . . 3  |-  .+  =  ( +P `  K
)
62, 3, 4, 5paddval 33434 . 2  |-  ( ( K  e.  B  /\  X  C_  A  /\  Y  C_  A )  ->  ( X  .+  Y )  =  ( ( X  u.  Y )  u.  {
p  e.  A  |  E. q  e.  X  E. r  e.  Y  p ( le `  K ) ( q ( join `  K
) r ) } ) )
71, 6syl5sseqr 3467 1  |-  ( ( K  e.  B  /\  X  C_  A  /\  Y  C_  A )  ->  ( X  u.  Y )  C_  ( X  .+  Y
) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ w3a 1007    = wceq 1452    e. wcel 1904   E.wrex 2757   {crab 2760    u. cun 3388    C_ wss 3390   class class class wbr 4395   ` cfv 5589  (class class class)co 6308   lecple 15275   joincjn 16267   Atomscatm 32900   +Pcpadd 33431
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1677  ax-4 1690  ax-5 1766  ax-6 1813  ax-7 1859  ax-8 1906  ax-9 1913  ax-10 1932  ax-11 1937  ax-12 1950  ax-13 2104  ax-ext 2451  ax-rep 4508  ax-sep 4518  ax-nul 4527  ax-pow 4579  ax-pr 4639  ax-un 6602
This theorem depends on definitions:  df-bi 190  df-or 377  df-an 378  df-3an 1009  df-tru 1455  df-ex 1672  df-nf 1676  df-sb 1806  df-eu 2323  df-mo 2324  df-clab 2458  df-cleq 2464  df-clel 2467  df-nfc 2601  df-ne 2643  df-ral 2761  df-rex 2762  df-reu 2763  df-rab 2765  df-v 3033  df-sbc 3256  df-csb 3350  df-dif 3393  df-un 3395  df-in 3397  df-ss 3404  df-nul 3723  df-if 3873  df-pw 3944  df-sn 3960  df-pr 3962  df-op 3966  df-uni 4191  df-iun 4271  df-br 4396  df-opab 4455  df-mpt 4456  df-id 4754  df-xp 4845  df-rel 4846  df-cnv 4847  df-co 4848  df-dm 4849  df-rn 4850  df-res 4851  df-ima 4852  df-iota 5553  df-fun 5591  df-fn 5592  df-f 5593  df-f1 5594  df-fo 5595  df-f1o 5596  df-fv 5597  df-ov 6311  df-oprab 6312  df-mpt2 6313  df-1st 6812  df-2nd 6813  df-padd 33432
This theorem is referenced by:  pclunN  33534  paddunN  33563  pclfinclN  33586
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