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Theorem lubss 14225
Description: Subset law for least upper bounds. (chsupss 21921 analog.) (Contributed by NM, 20-Oct-2011.)
Hypotheses
Ref Expression
lublem.b  |-  B  =  ( Base `  K
)
lublem.l  |-  .<_  =  ( le `  K )
lublem.u  |-  U  =  ( lub `  K
)
Assertion
Ref Expression
lubss  |-  ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  ->  ( U `  S )  .<_  ( U `  T
) )

Proof of Theorem lubss
Dummy variable  y is distinct from all other variables.
StepHypRef Expression
1 simp1 955 . . 3  |-  ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  ->  K  e.  CLat )
2 sstr2 3186 . . . . 5  |-  ( S 
C_  T  ->  ( T  C_  B  ->  S  C_  B ) )
32impcom 419 . . . 4  |-  ( ( T  C_  B  /\  S  C_  T )  ->  S  C_  B )
433adant1 973 . . 3  |-  ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  ->  S  C_  B )
5 lublem.b . . . . 5  |-  B  =  ( Base `  K
)
6 lublem.u . . . . 5  |-  U  =  ( lub `  K
)
75, 6clatlubcl 14217 . . . 4  |-  ( ( K  e.  CLat  /\  T  C_  B )  ->  ( U `  T )  e.  B )
873adant3 975 . . 3  |-  ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  ->  ( U `  T )  e.  B )
91, 4, 83jca 1132 . 2  |-  ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  ->  ( K  e.  CLat  /\  S  C_  B  /\  ( U `
 T )  e.  B ) )
10 simpl1 958 . . . 4  |-  ( ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  /\  y  e.  S )  ->  K  e.  CLat )
11 simpl2 959 . . . 4  |-  ( ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  /\  y  e.  S )  ->  T  C_  B )
12 ssel2 3175 . . . . 5  |-  ( ( S  C_  T  /\  y  e.  S )  ->  y  e.  T )
13123ad2antl3 1119 . . . 4  |-  ( ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  /\  y  e.  S )  ->  y  e.  T )
14 lublem.l . . . . 5  |-  .<_  =  ( le `  K )
155, 14, 6lubub 14223 . . . 4  |-  ( ( K  e.  CLat  /\  T  C_  B  /\  y  e.  T )  ->  y  .<_  ( U `  T
) )
1610, 11, 13, 15syl3anc 1182 . . 3  |-  ( ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  /\  y  e.  S )  ->  y  .<_  ( U `  T ) )
1716ralrimiva 2626 . 2  |-  ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  ->  A. y  e.  S  y  .<_  ( U `  T ) )
185, 14, 6lubl 14224 . 2  |-  ( ( K  e.  CLat  /\  S  C_  B  /\  ( U `
 T )  e.  B )  ->  ( A. y  e.  S  y  .<_  ( U `  T )  ->  ( U `  S )  .<_  ( U `  T
) ) )
199, 17, 18sylc 56 1  |-  ( ( K  e.  CLat  /\  T  C_  B  /\  S  C_  T )  ->  ( U `  S )  .<_  ( U `  T
) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 358    /\ w3a 934    = wceq 1623    e. wcel 1684   A.wral 2543    C_ wss 3152   class class class wbr 4023   ` cfv 5255   Basecbs 13148   lecple 13215   lubclub 14076   CLatccla 14213
This theorem is referenced by:  lubel  14226  atlatmstc  29509  atlatle  29510  pmaple  29950  paddunN  30116  poml4N  30142
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-13 1686  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-rep 4131  ax-sep 4141  ax-nul 4149  ax-pow 4188  ax-pr 4214  ax-un 4512
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-eu 2147  df-mo 2148  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-nel 2449  df-ral 2548  df-rex 2549  df-reu 2550  df-rab 2552  df-v 2790  df-sbc 2992  df-csb 3082  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3456  df-if 3566  df-pw 3627  df-sn 3646  df-pr 3647  df-op 3649  df-uni 3828  df-iun 3907  df-br 4024  df-opab 4078  df-mpt 4079  df-id 4309  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-rn 4700  df-res 4701  df-ima 4702  df-iota 5219  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-undef 6298  df-riota 6304  df-lub 14108  df-clat 14214
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