Theorem dibn0 36442

Description: The value of the partial isomorphism B is not empty. (Contributed by NM, 18-Jan-2014.)

Hypotheses

Ref	Expression
dibn0.b	|- B = ( Base ` K )
dibn0.l	|- .<_ = ( le ` K )
dibn0.h	|- H = ( LHyp ` K )
dibn0.i	|- I = ( ( DIsoB ` K ) ` W )

Assertion

Ref	Expression
dibn0	|- ( ( ( K e. HL /\ W e. H ) /\ ( X e. B /\ X .<_ W ) ) -> ( I ` X ) =/= (/) )

Proof of Theorem dibn0

Dummy variable f is distinct from all other variables.

Step	Hyp	Ref	Expression
1		dibn0.b	. . 3 |- B = ( Base ` K )
2		dibn0.l	. . 3 |- .<_ = ( le ` K )
3		dibn0.h	. . 3 |- H = ( LHyp ` K )
4		eqid 2622	. . 3 |- ( ( LTrn ` K ) ` W ) = ( ( LTrn ` K ) ` W )
5		eqid 2622	. . 3 |- ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) ) = ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) )
6		eqid 2622	. . 3 |- ( ( DIsoA ` K ) ` W ) = ( ( DIsoA ` K ) ` W )
7		dibn0.i	. . 3 |- I = ( ( DIsoB ` K ) ` W )
8	1, 2, 3, 4, 5, 6, 7	dibval2 36433	. 2 |- ( ( ( K e. HL /\ W e. H ) /\ ( X e. B /\ X .<_ W ) ) -> ( I ` X ) = ( ( ( ( DIsoA ` K ) ` W ) ` X ) X. { ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) ) } ) )
9	1, 2, 3, 6	dian0 36328	. . . 4 |- ( ( ( K e. HL /\ W e. H ) /\ ( X e. B /\ X .<_ W ) ) -> ( ( ( DIsoA ` K ) ` W ) ` X ) =/= (/) )
10		fvex 6201	. . . . . 6 |- ( ( LTrn ` K ) ` W ) e. _V
11	10	mptex 6486	. . . . 5 |- ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) ) e. _V
12	11	snnz 4309	. . . 4 |- { ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) ) } =/= (/)
13	9, 12	jctir 561	. . 3 |- ( ( ( K e. HL /\ W e. H ) /\ ( X e. B /\ X .<_ W ) ) -> ( ( ( ( DIsoA ` K ) ` W ) ` X ) =/= (/) /\ { ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) ) } =/= (/) ) )
14		xpnz 5553	. . 3 |- ( ( ( ( ( DIsoA ` K ) ` W ) ` X ) =/= (/) /\ { ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) ) } =/= (/) ) <-> ( ( ( ( DIsoA ` K ) ` W ) ` X ) X. { ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) ) } ) =/= (/) )
15	13, 14	sylib 208	. 2 |- ( ( ( K e. HL /\ W e. H ) /\ ( X e. B /\ X .<_ W ) ) -> ( ( ( ( DIsoA ` K ) ` W ) ` X ) X. { ( f e. ( ( LTrn ` K ) ` W ) |-> ( _I |` B ) ) } ) =/= (/) )
16	8, 15	eqnetrd 2861	1 |- ( ( ( K e. HL /\ W e. H ) /\ ( X e. B /\ X .<_ W ) ) -> ( I ` X ) =/= (/) )

Syntax hints:   -> wi 4   /\ wa 384   = wceq 1483   e. wcel 1990   =/= wne 2794   (/)c0 3915   {csn 4177   class class class wbr 4653   |-> cmpt 4729   _I cid 5023   X. cxp 5112   |` cres 5116   ` cfv 5888   Basecbs 15857   lecple 15948   HLchlt 34637   LHypclh 35270   LTrncltrn 35387   DIsoAcdia 36317   DIsoBcdib 36427

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-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

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-reu 2919  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-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  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-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-map 7859  df-preset 16928  df-poset 16946  df-plt 16958  df-lub 16974  df-glb 16975  df-join 16976  df-meet 16977  df-p0 17039  df-p1 17040  df-lat 17046  df-clat 17108  df-oposet 34463  df-ol 34465  df-oml 34466  df-covers 34553  df-ats 34554  df-atl 34585  df-cvlat 34609  df-hlat 34638  df-lhyp 35274  df-laut 35275  df-ldil 35390  df-ltrn 35391  df-trl 35446  df-disoa 36318  df-dib 36428

This theorem is referenced by:  dibord  36448  diblss  36459