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Theorem fneer 15496
Description: Fineness intersected with its converse is an equivalence relation.
Assertion
Ref Expression
fneer |- Er (Fne i^i `'Fne)

Proof of Theorem fneer
StepHypRef Expression
1 visset 2295 . . . . 5 |- z e. _V
2 fnetr 15495 . . . . 5 |- ((z e. _V /\ xFney /\ yFnez) -> xFnez)
31, 2mp3an1 1178 . . . 4 |- ((xFney /\ yFnez) -> xFnez)
43ax-gen 1305 . . 3 |- A.z((xFney /\ yFnez) -> xFnez)
54gen2 1329 . 2 |- A.xA.yA.z((xFney /\ yFnez) -> xFnez)
6 trer 15361 . 2 |- (A.xA.yA.z((xFney /\ yFnez) -> xFnez) -> Er (Fne i^i `'Fne))
75, 6ax-mp 7 1 |- Er (Fne i^i `'Fne)
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 240  A.wal 1296   e. wcel 1300  _Vcvv 2292   i^i cin 2592   class class class wbr 3338  `'ccnv 3985  Er wer 5315  Fnecfne 15457
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 1304  ax-gen 1305  ax-8 1306  ax-9 1307  ax-10 1308  ax-11 1309  ax-12 1310  ax-13 1311  ax-14 1312  ax-17 1317  ax-4 1319  ax-5o 1321  ax-6o 1324  ax-9o 1481  ax-10o 1500  ax-16 1580  ax-11o 1588  ax-ext 1865  ax-sep 3438  ax-nul 3445  ax-pow 3481  ax-pr 3524  ax-un 3790
This theorem depends on definitions:  df-bi 164  df-or 241  df-an 242  df-3an 860  df-ex 1327  df-sb 1536  df-eu 1775  df-mo 1776  df-clab 1872  df-cleq 1877  df-clel 1880  df-ne 2019  df-ral 2109  df-rex 2110  df-v 2294  df-dif 2597  df-un 2600  df-in 2603  df-ss 2605  df-nul 2876  df-pw 3035  df-sn 3049  df-pr 3050  df-op 3053  df-uni 3178  df-br 3339  df-opab 3396  df-xp 4000  df-rel 4001  df-cnv 4002  df-co 4003  df-er 5318  df-fne 15463
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