Theorem rrgss 20719

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 2734	. . 3 ⊢ (.r‘𝑅) = (.r‘𝑅)
4		eqid 2734	. . 3 ⊢ (0g‘𝑅) = (0g‘𝑅)
5	1, 2, 3, 4	rrgval 20714	. 2 ⊢ 𝐸 = {𝑥 ∈ 𝐵 ∣ ∀𝑦 ∈ 𝐵 ((𝑥(.r‘𝑅)𝑦) = (0g‘𝑅) → 𝑦 = (0g‘𝑅))}
6	5	ssrab3 4099	1 ⊢ 𝐸 ⊆ 𝐵

Syntax hints:   → wi 4   = wceq 1537  ∀wral 3063   ⊆ wss 3970  ‘cfv 6572  (class class class)co 7445  Basecbs 17253  ._rcmulr 17307  0_gc0g 17494  RLRegcrlreg 20708

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2105  ax-9 2113  ax-10 2136  ax-11 2153  ax-12 2173  ax-ext 2705  ax-sep 5320  ax-nul 5327  ax-pr 5450

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2726  df-clel 2813  df-nfc 2890  df-ne 2943  df-ral 3064  df-rex 3073  df-rab 3439  df-v 3484  df-dif 3973  df-un 3975  df-in 3977  df-ss 3987  df-nul 4348  df-if 4549  df-pw 4624  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-br 5170  df-opab 5232  df-mpt 5253  df-id 5597  df-xp 5705  df-rel 5706  df-cnv 5707  df-co 5708  df-dm 5709  df-iota 6524  df-fun 6574  df-fv 6580  df-ov 7448  df-rlreg 20711

This theorem is referenced by:  isdomn6  20731  znrrg  21602  mdegvsca  26127  deg1mul3  26167  rrgsubm  33245  fracbas  33264  fracerl  33265  fracfld  33267  assalactf1o  33640  assarrginv  33641