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Theorem tcex 6157
 Description: The cardinal T operation always yields a set. (Contributed by SF, 2-Mar-2015.)
Assertion
Ref Expression
tcex Tc

Proof of Theorem tcex
Dummy variables are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-tc 6103 . 2 Tc NC Nc 1
2 iotaex 4356 . 2 NC Nc 1
31, 2eqeltri 2423 1 Tc
 Colors of variables: wff setvar class Syntax hints:   wa 358   wceq 1642   wcel 1710  wrex 2615  cvv 2859  1 cpw1 4135  cio 4337   NC cncs 6088   Nc cnc 6091   Tc ctc 6093 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 4078 This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-eu 2208  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2478  df-ne 2518  df-ral 2619  df-rex 2620  df-v 2861  df-sbc 3047  df-nin 3211  df-compl 3212  df-in 3213  df-un 3214  df-dif 3215  df-ss 3259  df-nul 3551  df-sn 3741  df-pr 3742  df-uni 3892  df-iota 4339  df-tc 6103 This theorem is referenced by:  fntcfn  6245  brtcfn  6246  nmembers1lem1  6268  nchoicelem11  6299  nchoicelem16  6304
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