Theorem elecg 6683

Description: Membership in an equivalence class. Theorem 72 of [Suppes] p. 82. (Contributed by Mario Carneiro, 9-Jul-2014.)

Assertion

Ref	Expression
elecg	|- ( ( A e. V /\ B e. W ) -> ( A e. [ B ] R <-> B R A ) )

Proof of Theorem elecg

Step	Hyp	Ref	Expression
1		elimasng 5069	. . 3 |- ( ( B e. W /\ A e. V ) -> ( A e. ( R " { B } ) <-> <. B , A >. e. R ) )
2	1	ancoms 268	. 2 |- ( ( A e. V /\ B e. W ) -> ( A e. ( R " { B } ) <-> <. B , A >. e. R ) )
3		df-ec 6645	. . 3 |- [ B ] R = ( R " { B } )
4	3	eleq2i 2274	. 2 |- ( A e. [ B ] R <-> A e. ( R " { B } ) )
5		df-br 4060	. 2 |- ( B R A <-> <. B , A >. e. R )
6	2, 4, 5	3bitr4g 223	1 |- ( ( A e. V /\ B e. W ) -> ( A e. [ B ] R <-> B R A ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   e. wcel 2178   {csn 3643   <.cop 3646   class class class wbr 4059   "cima 4696   [cec 6641

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-pow 4234  ax-pr 4269

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-ral 2491  df-rex 2492  df-v 2778  df-sbc 3006  df-un 3178  df-in 3180  df-ss 3187  df-pw 3628  df-sn 3649  df-pr 3650  df-op 3652  df-br 4060  df-opab 4122  df-xp 4699  df-cnv 4701  df-dm 4703  df-rn 4704  df-res 4705  df-ima 4706  df-ec 6645

This theorem is referenced by:  elec  6684  relelec  6685  ecdmn0m  6687  erth  6689  ecidg  6709  qsel  6722  xmetec  15024  blpnfctr  15026  xmetresbl  15027