NFE Home New Foundations Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  NFE Home  >  Th. List  >  cokex Unicode version

Theorem cokex 4311
Description: The Kuratowski composition of two sets is a set. (Contributed by SF, 14-Jan-2015.)
Hypotheses
Ref Expression
cokex.1
cokex.2
Assertion
Ref Expression
cokex k

Proof of Theorem cokex
StepHypRef Expression
1 cokex.1 . 2
2 cokex.2 . 2
3 cokexg 4310 . 2 k
41, 2, 3mp2an 653 1 k
Colors of variables: wff setvar class
Syntax hints:   wcel 1710  cvv 2860   k ccomk 4181
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4079  ax-xp 4080  ax-cnv 4081  ax-1c 4082  ax-si 4084  ax-ins2 4085  ax-ins3 4086  ax-typlower 4087  ax-sn 4088
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2479  df-ne 2519  df-ral 2620  df-rex 2621  df-v 2862  df-nin 3212  df-compl 3213  df-in 3214  df-un 3215  df-dif 3216  df-ss 3260  df-nul 3552  df-pw 3725  df-sn 3742  df-pr 3743  df-opk 4059  df-1c 4137  df-pw1 4138  df-xpk 4186  df-cnvk 4187  df-ins2k 4188  df-ins3k 4189  df-imak 4190  df-cok 4191  df-p6 4192  df-sik 4193
This theorem is referenced by:  nncex  4397  nnsucelrlem1  4425  opexg  4588  proj2exg  4593  setconslem5  4736  1stex  4740  swapex  4743
  Copyright terms: Public domain W3C validator