Theorem elecg 6840

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 5153	. . 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 6802	. . 3 |- [ B ] R = ( R " { B } )
4	3	eleq2i 2305	. 2 |- ( A e. [ B ] R <-> A e. ( R " { B } ) )
5		df-br 4129	. 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 2209   {csn 3708   <.cop 3711   class class class wbr 4128   "cima 4775   [cec 6798

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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4247  ax-pow 4309  ax-pr 4344

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-sbc 3052  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-br 4129  df-opab 4191  df-xp 4778  df-cnv 4780  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-ec 6802

This theorem is referenced by:  elec  6841  relelec  6842  ecdmn0m  6844  erth  6846  ecidg  6866  qsel  6879  xmetec  15464  blpnfctr  15466  xmetresbl  15467