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Theorem subrngss 20807
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
StepHypRef Expression
1 subrngss.1 . . 3 𝐵 = (Base‘𝑅)
21issubrng 20806 . 2 (𝐴 ∈ (SubRng‘𝑅) ↔ (𝑅 ∈ Rng ∧ (𝑅 ↾s 𝐴) ∈ Rng ∧ 𝐴 ⊆ 𝐵))
32simp3bi 1165 1 (𝐴 ∈ (SubRng‘𝑅) → 𝐴 ⊆ 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   = wceq 1569   ∈ wcel 2144   ⊆ wss 3896  ‘cfv 6541  (class class class)co 7422  Basecbs 17394   ↾s cress 17415  Rngcrng 20381  SubRngcsubrng 20804
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pow 5326  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3897  df-dif 4046  df-in 4090  df-un 4150  df-nul 4278  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-res 5662  df-ima 5663  df-iota 6496  df-fun 6543  df-fv 6549  df-ov 7425  df-subrng 20805
This theorem is used by:  subrngsubg  20811  subrngmre  20821  subsubrng  20822  rhmimasubrnglem  20824  rhmimasubrng  20825
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