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Theorem hbmo1 1935
Description: Bound-variable hypothesis builder for "at most one." (Contributed by NM, 8-Mar-1995.)
Assertion
Ref Expression
hbmo1

Proof of Theorem hbmo1
StepHypRef Expression
1 df-mo 1901 . 2
2 hbe1 1381 . . 3
3 hbeu1 1907 . . 3
42, 3hbim 1434 . 2
51, 4hbxfrbi 1358 1
Colors of variables: wff set class
Syntax hints:   wi 4  wal 1240  wex 1378  weu 1897  wmo 1898
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-5 1333  ax-7 1334  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-4 1397  ax-ial 1424  ax-i5r 1425
This theorem depends on definitions:  df-bi 110  df-eu 1900  df-mo 1901
This theorem is referenced by:  mopick2  1980  moexexdc  1981
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