Theorem subrngss 20516

Description: A subring is a subset. (Contributed by AV, 14-Feb-2025.)

Hypothesis

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

Assertion

Ref	Expression
subrngss	⊢ (𝐴 ∈ (SubRng‘𝑅) → 𝐴 ⊆ 𝐵)

Proof of Theorem subrngss

Step	Hyp	Ref	Expression
1		subrngss.1	. . 3 ⊢ 𝐵 = (Base‘𝑅)
2	1	issubrng 20515	. 2 ⊢ (𝐴 ∈ (SubRng‘𝑅) ↔ (𝑅 ∈ Rng ∧ (𝑅 ↾s 𝐴) ∈ Rng ∧ 𝐴 ⊆ 𝐵))
3	2	simp3bi 1148	1 ⊢ (𝐴 ∈ (SubRng‘𝑅) → 𝐴 ⊆ 𝐵)

Syntax hints:   → wi 4   = wceq 1542   ∈ wcel 2114   ⊆ wss 3890  ‘cfv 6492  (class class class)co 7360  Basecbs 17170   ↾_s cress 17191  Rngcrng 20124  SubRngcsubrng 20513

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 2709  ax-sep 5231  ax-nul 5241  ax-pow 5302  ax-pr 5370

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 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-rab 3391  df-v 3432  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-pw 4544  df-sn 4569  df-pr 4571  df-op 4575  df-uni 4852  df-br 5087  df-opab 5149  df-mpt 5168  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fv 6500  df-ov 7363  df-subrng 20514

This theorem is referenced by:  subrngsubg  20520  subrngmre  20530  subsubrng  20531  rhmimasubrnglem  20533  rhmimasubrng  20534