Theorem rrgss 20799

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	⊢ 𝐸 ⊆ 𝐵

Proof of Theorem rrgss

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		rrgss.e	. . 3 ⊢ 𝐸 = (RLReg‘𝑅)
2		rrgss.b	. . 3 ⊢ 𝐵 = (Base‘𝑅)
3		eqid 2731	. . 3 ⊢ (.r‘𝑅) = (.r‘𝑅)
4		eqid 2731	. . 3 ⊢ (0g‘𝑅) = (0g‘𝑅)
5	1, 2, 3, 4	rrgval 20794	. 2 ⊢ 𝐸 = {𝑥 ∈ 𝐵 ∣ ∀𝑦 ∈ 𝐵 ((𝑥(.r‘𝑅)𝑦) = (0g‘𝑅) → 𝑦 = (0g‘𝑅))}
6	5	ssrab3 4045	1 ⊢ 𝐸 ⊆ 𝐵

Syntax hints:   → wi 4   = wceq 1541  ∀wral 3060   ⊆ wss 3913  ‘cfv 6501  (class class class)co 7362  Basecbs 17094  ._rcmulr 17148  0_gc0g 17335  RLRegcrlreg 20786

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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2702  ax-sep 5261  ax-nul 5268  ax-pr 5389

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2533  df-eu 2562  df-clab 2709  df-cleq 2723  df-clel 2809  df-nfc 2884  df-ne 2940  df-ral 3061  df-rex 3070  df-rab 3406  df-v 3448  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4288  df-if 4492  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4871  df-br 5111  df-opab 5173  df-mpt 5194  df-id 5536  df-xp 5644  df-rel 5645  df-cnv 5646  df-co 5647  df-dm 5648  df-iota 6453  df-fun 6503  df-fv 6509  df-ov 7365  df-rlreg 20790

This theorem is referenced by:  znrrg  21009  mdegvsca  25478  deg1mul3  25517