Theorem rrgss 20068

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 2824	. . 3 ⊢ (.r‘𝑅) = (.r‘𝑅)
4		eqid 2824	. . 3 ⊢ (0g‘𝑅) = (0g‘𝑅)
5	1, 2, 3, 4	rrgval 20063	. 2 ⊢ 𝐸 = {𝑥 ∈ 𝐵 ∣ ∀𝑦 ∈ 𝐵 ((𝑥(.r‘𝑅)𝑦) = (0g‘𝑅) → 𝑦 = (0g‘𝑅))}
6	5	ssrab3 4060	1 ⊢ 𝐸 ⊆ 𝐵

Syntax hints:   → wi 4   = wceq 1536  ∀wral 3141   ⊆ wss 3939  ‘cfv 6358  (class class class)co 7159  Basecbs 16486  ._rcmulr 16569  0_gc0g 16716  RLRegcrlreg 20055

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2796  ax-sep 5206  ax-nul 5213  ax-pow 5269  ax-pr 5333

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1539  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2966  df-ral 3146  df-rex 3147  df-rab 3150  df-v 3499  df-sbc 3776  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-nul 4295  df-if 4471  df-sn 4571  df-pr 4573  df-op 4577  df-uni 4842  df-br 5070  df-opab 5132  df-mpt 5150  df-id 5463  df-xp 5564  df-rel 5565  df-cnv 5566  df-co 5567  df-dm 5568  df-iota 6317  df-fun 6360  df-fv 6366  df-ov 7162  df-rlreg 20059

This theorem is referenced by:  znrrg  20715  mdegvsca  24673  deg1mul3  24712