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Theorem smodm2 5851
 Description: The domain of a strictly monotone ordinal function is an ordinal. (Contributed by Mario Carneiro, 12-Mar-2013.)
Assertion
Ref Expression
smodm2

Proof of Theorem smodm2
StepHypRef Expression
1 smodm 5847 . 2
2 fndm 4941 . . . 4
3 ordeq 4075 . . . 4
42, 3syl 14 . . 3
54biimpa 280 . 2
61, 5sylan2 270 1
 Colors of variables: wff set class Syntax hints:   wi 4   wa 97   wb 98   wceq 1242   word 4065   cdm 4288   wfn 4840   wsmo 5841 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 629  ax-5 1333  ax-7 1334  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-8 1392  ax-10 1393  ax-11 1394  ax-i12 1395  ax-bndl 1396  ax-4 1397  ax-17 1416  ax-i9 1420  ax-ial 1424  ax-i5r 1425  ax-ext 2019 This theorem depends on definitions:  df-bi 110  df-3an 886  df-tru 1245  df-nf 1347  df-sb 1643  df-clab 2024  df-cleq 2030  df-clel 2033  df-nfc 2164  df-ral 2305  df-rex 2306  df-in 2918  df-ss 2925  df-uni 3572  df-tr 3846  df-iord 4069  df-fn 4848  df-smo 5842 This theorem is referenced by: (None)
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