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Theorem rrgss 20633
Description: Left-regular elements are a subset of the base set. (Contributed by Stefan O'Rear, 22-Mar-2015.)
Hypotheses
Ref Expression
rrgss.e 𝐸 = (RLReg‘𝑅)
rrgss.b 𝐵 = (Base‘𝑅)
Assertion
Ref Expression
rrgss 𝐸𝐵

Proof of Theorem rrgss
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 rrgss.e . . 3 𝐸 = (RLReg‘𝑅)
2 rrgss.b . . 3 𝐵 = (Base‘𝑅)
3 eqid 2734 . . 3 (.r𝑅) = (.r𝑅)
4 eqid 2734 . . 3 (0g𝑅) = (0g𝑅)
51, 2, 3, 4rrgval 20628 . 2 𝐸 = {𝑥𝐵 ∣ ∀𝑦𝐵 ((𝑥(.r𝑅)𝑦) = (0g𝑅) → 𝑦 = (0g𝑅))}
65ssrab3 4032 1 𝐸𝐵
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1541  wral 3049  wss 3899  cfv 6490  (class class class)co 7356  Basecbs 17134  .rcmulr 17176  0gc0g 17357  RLRegcrlreg 20622
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 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2706  ax-sep 5239  ax-nul 5249  ax-pr 5375
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2567  df-clab 2713  df-cleq 2726  df-clel 2809  df-nfc 2883  df-ne 2931  df-ral 3050  df-rex 3059  df-rab 3398  df-v 3440  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4284  df-if 4478  df-pw 4554  df-sn 4579  df-pr 4581  df-op 4585  df-uni 4862  df-br 5097  df-opab 5159  df-mpt 5178  df-id 5517  df-xp 5628  df-rel 5629  df-cnv 5630  df-co 5631  df-dm 5632  df-iota 6446  df-fun 6492  df-fv 6498  df-ov 7359  df-rlreg 20625
This theorem is referenced by:  isdomn6  20645  znrrg  21518  mdegvsca  26035  deg1mul3  26075  rrgsubm  33315  fracbas  33336  fracerl  33337  fracfld  33339  assalactf1o  33741  assarrginv  33742
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