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Theorem rngone0 35307
Description: The base set of a ring is not empty. (Contributed by FL, 24-Jan-2010.) (New usage is discouraged.)
Hypotheses
Ref Expression
rngone0.1 𝐺 = (1st𝑅)
rngone0.2 𝑋 = ran 𝐺
Assertion
Ref Expression
rngone0 (𝑅 ∈ RingOps → 𝑋 ≠ ∅)

Proof of Theorem rngone0
StepHypRef Expression
1 rngone0.1 . . 3 𝐺 = (1st𝑅)
21rngogrpo 35306 . 2 (𝑅 ∈ RingOps → 𝐺 ∈ GrpOp)
3 rngone0.2 . . 3 𝑋 = ran 𝐺
43grpon0 28283 . 2 (𝐺 ∈ GrpOp → 𝑋 ≠ ∅)
52, 4syl 17 1 (𝑅 ∈ RingOps → 𝑋 ≠ ∅)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1538  wcel 2114  wne 3011  c0 4265  ran crn 5533  cfv 6334  1st c1st 7673  GrpOpcgr 28270  RingOpscrngo 35290
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2178  ax-ext 2794  ax-sep 5179  ax-nul 5186  ax-pow 5243  ax-pr 5307  ax-un 7446
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2622  df-eu 2653  df-clab 2801  df-cleq 2815  df-clel 2894  df-nfc 2962  df-ne 3012  df-ral 3135  df-rex 3136  df-rab 3139  df-v 3471  df-sbc 3748  df-csb 3856  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-nul 4266  df-if 4440  df-sn 4540  df-pr 4542  df-op 4546  df-uni 4814  df-iun 4896  df-br 5043  df-opab 5105  df-mpt 5123  df-id 5437  df-xp 5538  df-rel 5539  df-cnv 5540  df-co 5541  df-dm 5542  df-rn 5543  df-iota 6293  df-fun 6336  df-fn 6337  df-f 6338  df-fo 6340  df-fv 6342  df-ov 7143  df-1st 7675  df-2nd 7676  df-grpo 28274  df-ablo 28326  df-rngo 35291
This theorem is referenced by:  rngoueqz  35336
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