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Theorem dfid2 5160
 Description: Alternate definition of the identity relation. (Contributed by NM, 15-Mar-2007.)
Assertion
Ref Expression
dfid2 I = {⟨𝑥, 𝑥⟩ ∣ 𝑥 = 𝑥}

Proof of Theorem dfid2
StepHypRef Expression
1 dfid3 5158 1 I = {⟨𝑥, 𝑥⟩ ∣ 𝑥 = 𝑥}
 Colors of variables: wff setvar class Syntax hints:   = wceq 1630  {copab 4844   I cid 5156 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1869  ax-4 1884  ax-5 1990  ax-6 2056  ax-7 2092  ax-9 2153  ax-10 2173  ax-11 2189  ax-12 2202  ax-13 2407  ax-ext 2750 This theorem depends on definitions:  df-bi 197  df-an 383  df-or 827  df-3an 1072  df-tru 1633  df-ex 1852  df-nf 1857  df-sb 2049  df-clab 2757  df-cleq 2763  df-clel 2766  df-nfc 2901  df-rab 3069  df-v 3351  df-dif 3724  df-un 3726  df-in 3728  df-ss 3735  df-nul 4062  df-if 4224  df-sn 4315  df-pr 4317  df-op 4321  df-opab 4845  df-id 5157 This theorem is referenced by:  fsplit  7432
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