Theorem smoiun 6545

Description: The value of a strictly monotone ordinal function contains its indexed union. (Contributed by Andrew Salmon, 22-Nov-2011.)

Assertion

Ref	Expression
smoiun	|- ( ( Smo B /\ A e. dom B ) -> U_ x e. A ( B ` x ) C_ ( B ` A ) )

Distinct variable groups:   x, A   x, B

Proof of Theorem smoiun

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eliun 4000	. . 3 |- ( y e. U_ x e. A ( B ` x ) <-> E. x e. A y e. ( B ` x ) )
2		smofvon 6543	. . . . 5 |- ( ( Smo B /\ A e. dom B ) -> ( B ` A ) e. On )
3		smoel 6544	. . . . . 6 |- ( ( Smo B /\ A e. dom B /\ x e. A ) -> ( B ` x ) e. ( B ` A ) )
4	3	3expia 1232	. . . . 5 |- ( ( Smo B /\ A e. dom B ) -> ( x e. A -> ( B ` x ) e. ( B ` A ) ) )
5		ontr1 4515	. . . . . 6 |- ( ( B ` A ) e. On -> ( ( y e. ( B ` x ) /\ ( B ` x ) e. ( B ` A ) ) -> y e. ( B ` A ) ) )
6	5	expcomd 1487	. . . . 5 |- ( ( B ` A ) e. On -> ( ( B ` x ) e. ( B ` A ) -> ( y e. ( B ` x ) -> y e. ( B ` A ) ) ) )
7	2, 4, 6	sylsyld 58	. . . 4 |- ( ( Smo B /\ A e. dom B ) -> ( x e. A -> ( y e. ( B ` x ) -> y e. ( B ` A ) ) ) )
8	7	rexlimdv 2661	. . 3 |- ( ( Smo B /\ A e. dom B ) -> ( E. x e. A y e. ( B ` x ) -> y e. ( B ` A ) ) )
9	1, 8	biimtrid 152	. 2 |- ( ( Smo B /\ A e. dom B ) -> ( y e. U_ x e. A ( B ` x ) -> y e. ( B ` A ) ) )
10	9	ssrdv 3248	1 |- ( ( Smo B /\ A e. dom B ) -> U_ x e. A ( B ` x ) C_ ( B ` A ) )

Syntax hints:   -> wi 4   /\ wa 104   e. wcel 2205   E.wrex 2523   C_ wss 3214   U_ciun 3996   Oncon0 4489   dom cdm 4754   ` cfv 5357   Smo wsmo 6529

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2208  ax-ext 2216  ax-sep 4233  ax-pow 4292  ax-pr 4327

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-sbc 3046  df-un 3218  df-in 3220  df-ss 3227  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-iun 3998  df-br 4115  df-opab 4177  df-tr 4214  df-id 4419  df-iord 4492  df-on 4494  df-xp 4760  df-rel 4761  df-cnv 4762  df-co 4763  df-dm 4764  df-rn 4765  df-iota 5317  df-fun 5359  df-fn 5360  df-f 5361  df-fv 5365  df-smo 6530

This theorem is referenced by: (None)