Theorem issmo2 7446

Description: Alternate definition of a strictly monotone ordinal function. (Contributed by Mario Carneiro, 12-Mar-2013.)

Assertion

Ref	Expression
issmo2	|- ( F : A --> B -> ( ( B C_ On /\ Ord A /\ A. x e. A A. y e. x ( F ` y ) e. ( F ` x ) ) -> Smo F ) )

Distinct variable groups:   x, A   x, F, y

Allowed substitution hints:   A( y)   B( x, y)

Proof of Theorem issmo2

Step	Hyp	Ref	Expression
1		fss 6056	. . . . 5 |- ( ( F : A --> B /\ B C_ On ) -> F : A --> On )
2	1	ex 450	. . . 4 |- ( F : A --> B -> ( B C_ On -> F : A --> On ) )
3		fdm 6051	. . . . 5 |- ( F : A --> B -> dom F = A )
4	3	feq2d 6031	. . . 4 |- ( F : A --> B -> ( F : dom F --> On <-> F : A --> On ) )
5	2, 4	sylibrd 249	. . 3 |- ( F : A --> B -> ( B C_ On -> F : dom F --> On ) )
6		ordeq 5730	. . . . 5 |- ( dom F = A -> ( Ord dom F <-> Ord A ) )
7	3, 6	syl 17	. . . 4 |- ( F : A --> B -> ( Ord dom F <-> Ord A ) )
8	7	biimprd 238	. . 3 |- ( F : A --> B -> ( Ord A -> Ord dom F ) )
9	3	raleqdv 3144	. . . 4 |- ( F : A --> B -> ( A. x e. dom F A. y e. x ( F ` y ) e. ( F ` x ) <-> A. x e. A A. y e. x ( F ` y ) e. ( F ` x ) ) )
10	9	biimprd 238	. . 3 |- ( F : A --> B -> ( A. x e. A A. y e. x ( F ` y ) e. ( F ` x ) -> A. x e. dom F A. y e. x ( F ` y ) e. ( F ` x ) ) )
11	5, 8, 10	3anim123d 1406	. 2 |- ( F : A --> B -> ( ( B C_ On /\ Ord A /\ A. x e. A A. y e. x ( F ` y ) e. ( F ` x ) ) -> ( F : dom F --> On /\ Ord dom F /\ A. x e. dom F A. y e. x ( F ` y ) e. ( F ` x ) ) ) )
12		dfsmo2 7444	. 2 |- ( Smo F <-> ( F : dom F --> On /\ Ord dom F /\ A. x e. dom F A. y e. x ( F ` y ) e. ( F ` x ) ) )
13	11, 12	syl6ibr 242	1 |- ( F : A --> B -> ( ( B C_ On /\ Ord A /\ A. x e. A A. y e. x ( F ` y ) e. ( F ` x ) ) -> Smo F ) )

Syntax hints:   -> wi 4   <-> wb 196   /\ w3a 1037   = wceq 1483   e. wcel 1990   A.wral 2912   C_ wss 3574   dom cdm 5114   Ord word 5722   Oncon0 5723   -->wf 5884   ` cfv 5888   Smo wsmo 7442

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

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-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-v 3202  df-in 3581  df-ss 3588  df-uni 4437  df-tr 4753  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-ord 5726  df-fn 5891  df-f 5892  df-smo 7443

This theorem is referenced by:  alephsmo  8925  cofsmo  9091  cfsmolem  9092