Theorem enref 8544

Description: Equinumerosity is reflexive. Theorem 1 of [Suppes] p. 92. (Contributed by NM, 25-Sep-2004.)

Hypothesis

Ref	Expression
enref.1	⊢ 𝐴 ∈ V

Assertion

Ref	Expression
enref	⊢ 𝐴 ≈ 𝐴

Proof of Theorem enref

Step	Hyp	Ref	Expression
1		enref.1	. 2 ⊢ 𝐴 ∈ V
2		enrefg 8543	. 2 ⊢ (𝐴 ∈ V → 𝐴 ≈ 𝐴)
3	1, 2	ax-mp 5	1 ⊢ 𝐴 ≈ 𝐴

Syntax hints:   ∈ wcel 2114  Vcvv 3496   class class class wbr 5068   ≈ cen 8508

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ral 3145  df-rex 3146  df-rab 3149  df-v 3498  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-br 5069  df-opab 5131  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-en 8512

This theorem is referenced by:  ener  8558  en0  8574  pwen  8692  phplem2  8699  phplem3  8700  isinf  8733  pssnn  8738  karden  9326  mappwen  9540  infmap2  9642  ackbij1lem5  9648  axcc4dom  9865  domtriomlem  9866  cfpwsdom  10008  0tsk  10179  fzennn  13339  qnnen  15568  rpnnen  15582  rexpen  15583  lmisfree  20988  met2ndci  23134  lgseisenlem2  25954  poimirlem9  34903  poimirlem26  34920