Theorem subrngid 20526

Description: Every non-unital ring is a subring of itself. (Contributed by AV, 14-Feb-2025.)

Hypothesis

Ref	Expression
subrngss.1	⊢ 𝐵 = (Base‘𝑅)

Assertion

Ref	Expression
subrngid	⊢ (𝑅 ∈ Rng → 𝐵 ∈ (SubRng‘𝑅))

Proof of Theorem subrngid

Step	Hyp	Ref	Expression
1		id 22	. 2 ⊢ (𝑅 ∈ Rng → 𝑅 ∈ Rng)
2		subrngss.1	. . . 4 ⊢ 𝐵 = (Base‘𝑅)
3	2	ressid 17214	. . 3 ⊢ (𝑅 ∈ Rng → (𝑅 ↾s 𝐵) = 𝑅)
4	3, 1	eqeltrd 2836	. 2 ⊢ (𝑅 ∈ Rng → (𝑅 ↾s 𝐵) ∈ Rng)
5		ssidd 3945	. 2 ⊢ (𝑅 ∈ Rng → 𝐵 ⊆ 𝐵)
6	2	issubrng 20524	. 2 ⊢ (𝐵 ∈ (SubRng‘𝑅) ↔ (𝑅 ∈ Rng ∧ (𝑅 ↾s 𝐵) ∈ Rng ∧ 𝐵 ⊆ 𝐵))
7	1, 4, 5, 6	syl3anbrc 1345	1 ⊢ (𝑅 ∈ Rng → 𝐵 ∈ (SubRng‘𝑅))

Syntax hints:   → wi 4   = wceq 1542   ∈ wcel 2114   ⊆ wss 3889  ‘cfv 6498  (class class class)co 7367  Basecbs 17179   ↾_s cress 17200  Rngcrng 20133  SubRngcsubrng 20522

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 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-sep 5231  ax-nul 5241  ax-pow 5307  ax-pr 5375

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3062  df-rab 3390  df-v 3431  df-sbc 3729  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-nul 4274  df-if 4467  df-pw 4543  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-br 5086  df-opab 5148  df-mpt 5167  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-iota 6454  df-fun 6500  df-fv 6506  df-ov 7370  df-oprab 7371  df-mpo 7372  df-ress 17201  df-subrng 20523

This theorem is referenced by:  subrngmre  20539