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Theorem pwtrOLD 28915
 Description: The power class of a transitive class is transitive. The proof of this theorem was automatically generated from pwtrVD 28914 using a tools command file, translateMWO.cmd , by translating the proof into its non-virtual deduction form and minimizing it. (Contributed by Alan Sare, 25-Aug-2011.) (Moved into main set.mm as pwtr 4242 and may be deleted by mathbox owner, AS. --NM 15-Jun-2014.) (Proof modification is discouraged.) (New usage is discouraged.)
Assertion
Ref Expression
pwtrOLD

Proof of Theorem pwtrOLD
Dummy variables are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simpr 447 . . . . . . . 8
21a1i 10 . . . . . . 7
3 elpwi 3646 . . . . . . 7
42, 3syl6 29 . . . . . 6
5 simpl 443 . . . . . . 7
65a1i 10 . . . . . 6
7 ssel 3187 . . . . . 6
84, 6, 7ee22 1352 . . . . 5
9 trss 4138 . . . . 5
108, 9syld 40 . . . 4
11 vex 2804 . . . . 5
1211elpw 3644 . . . 4
1310, 12syl6ibr 218 . . 3
1413alrimivv 1622 . 2
15 dftr2 4131 . 2
1614, 15sylibr 203 1
 Colors of variables: wff set class Syntax hints:   wi 4   wa 358  wal 1530   wcel 1696   wss 3165  cpw 3638   wtr 4129 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1536  ax-5 1547  ax-17 1606  ax-9 1644  ax-8 1661  ax-6 1715  ax-7 1720  ax-11 1727  ax-12 1878  ax-ext 2277 This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-tru 1310  df-ex 1532  df-nf 1535  df-sb 1639  df-clab 2283  df-cleq 2289  df-clel 2292  df-nfc 2421  df-ral 2561  df-v 2803  df-in 3172  df-ss 3179  df-pw 3640  df-uni 3844  df-tr 4130
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