Users' Mathboxes Mathbox for Jeff Madsen < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  rngone0 Structured version   Visualization version   GIF version

Theorem rngone0 37417
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 37416 . 2 (𝑅 ∈ RingOps → 𝐺 ∈ GrpOp)
3 rngone0.2 . . 3 𝑋 = ran 𝐺
43grpon0 30332 . 2 (𝐺 ∈ GrpOp → 𝑋 ≠ ∅)
52, 4syl 17 1 (𝑅 ∈ RingOps → 𝑋 ≠ ∅)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1533  wcel 2098  wne 2937  c0 4326  ran crn 5683  cfv 6553  1st c1st 7997  GrpOpcgr 30319  RingOpscrngo 37400
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2166  ax-ext 2699  ax-sep 5303  ax-nul 5310  ax-pr 5433  ax-un 7746
This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2529  df-eu 2558  df-clab 2706  df-cleq 2720  df-clel 2806  df-nfc 2881  df-ne 2938  df-ral 3059  df-rex 3068  df-rab 3431  df-v 3475  df-sbc 3779  df-csb 3895  df-dif 3952  df-un 3954  df-in 3956  df-ss 3966  df-nul 4327  df-if 4533  df-sn 4633  df-pr 4635  df-op 4639  df-uni 4913  df-iun 5002  df-br 5153  df-opab 5215  df-mpt 5236  df-id 5580  df-xp 5688  df-rel 5689  df-cnv 5690  df-co 5691  df-dm 5692  df-rn 5693  df-iota 6505  df-fun 6555  df-fn 6556  df-f 6557  df-fo 6559  df-fv 6561  df-ov 7429  df-1st 7999  df-2nd 8000  df-grpo 30323  df-ablo 30375  df-rngo 37401
This theorem is referenced by:  rngoueqz  37446
  Copyright terms: Public domain W3C validator