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Theorem onintss 4521
Description: If a property is true for an ordinal number, then the minimum ordinal number for which it is true is smaller or equal. Theorem Schema 61 of [Suppes] p. 228. (Contributed by NM, 3-Oct-2003.)
Hypothesis
Ref Expression
onintss.1  |-  ( x  =  A  ->  ( ph 
<->  ps ) )
Assertion
Ref Expression
onintss  |-  ( A  e.  On  ->  ( ps  ->  |^| { x  e.  On  |  ph }  C_  A ) )
Distinct variable groups:    ps, x    x, A
Allowed substitution hint:    ph( x)

Proof of Theorem onintss
StepHypRef Expression
1 onintss.1 . . 3  |-  ( x  =  A  ->  ( ph 
<->  ps ) )
21intminss 3967 . 2  |-  ( ( A  e.  On  /\  ps )  ->  |^| { x  e.  On  |  ph }  C_  A )
32ex 423 1  |-  ( A  e.  On  ->  ( ps  ->  |^| { x  e.  On  |  ph }  C_  A ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 176    = wceq 1642    e. wcel 1710   {crab 2623    C_ wss 3228   |^|cint 3941   Oncon0 4471
This theorem is referenced by:  rankval3b  7585  cardne  7685
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1930  ax-ext 2339
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2345  df-cleq 2351  df-clel 2354  df-nfc 2483  df-rab 2628  df-v 2866  df-in 3235  df-ss 3242  df-int 3942
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