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Theorem subsubrng2 20700
Description: The set of subrings of a subring are the smaller subrings. (Contributed by AV, 15-Feb-2025.)
Hypothesis
Ref Expression
subsubrng.s 𝑆 = (𝑅s 𝐴)
Assertion
Ref Expression
subsubrng2 (𝐴 ∈ (SubRng‘𝑅) → (SubRng‘𝑆) = ((SubRng‘𝑅) ∩ 𝒫 𝐴))

Proof of Theorem subsubrng2
Dummy variable 𝑎 is distinct from all other variables.
StepHypRef Expression
1 subsubrng.s . . . 4 𝑆 = (𝑅s 𝐴)
21subsubrng 20699 . . 3 (𝐴 ∈ (SubRng‘𝑅) → (𝑎 ∈ (SubRng‘𝑆) ↔ (𝑎 ∈ (SubRng‘𝑅) ∧ 𝑎𝐴)))
3 elin 3924 . . . 4 (𝑎 ∈ ((SubRng‘𝑅) ∩ 𝒫 𝐴) ↔ (𝑎 ∈ (SubRng‘𝑅) ∧ 𝑎 ∈ 𝒫 𝐴))
4 velpw 4572 . . . . 5 (𝑎 ∈ 𝒫 𝐴𝑎𝐴)
54anbi2i 635 . . . 4 ((𝑎 ∈ (SubRng‘𝑅) ∧ 𝑎 ∈ 𝒫 𝐴) ↔ (𝑎 ∈ (SubRng‘𝑅) ∧ 𝑎𝐴))
63, 5bitr2i 279 . . 3 ((𝑎 ∈ (SubRng‘𝑅) ∧ 𝑎𝐴) ↔ 𝑎 ∈ ((SubRng‘𝑅) ∩ 𝒫 𝐴))
72, 6bitrdi 290 . 2 (𝐴 ∈ (SubRng‘𝑅) → (𝑎 ∈ (SubRng‘𝑆) ↔ 𝑎 ∈ ((SubRng‘𝑅) ∩ 𝒫 𝐴)))
87eqrdv 2764 1 (𝐴 ∈ (SubRng‘𝑅) → (SubRng‘𝑆) = ((SubRng‘𝑅) ∩ 𝒫 𝐴))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wa 401   = wceq 1570  wcel 2146  cin 3907  wss 3908  𝒫 cpw 4567  cfv 6543  (class class class)co 7423  s cress 17315  SubRngcsubrng 20681
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2738  ax-sep 5262  ax-nul 5274  ax-pow 5341  ax-pr 5409  ax-un 7745  ax-cnex 11174  ax-1cn 11176  ax-addcl 11178
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2570  df-eu 2600  df-clab 2745  df-cleq 2758  df-clel 2841  df-nfc 2915  df-ne 2962  df-ral 3083  df-rex 3093  df-reu 3373  df-rab 3420  df-v 3460  df-sbc 3748  df-csb 3857  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-pss 3928  df-nul 4290  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-iun 4963  df-br 5115  df-opab 5179  df-mpt 5198  df-tr 5224  df-id 5561  df-eprel 5566  df-po 5574  df-so 5575  df-fr 5619  df-we 5621  df-xp 5672  df-rel 5673  df-cnv 5674  df-co 5675  df-dm 5676  df-rn 5677  df-res 5678  df-ima 5679  df-pred 6309  df-ord 6370  df-on 6371  df-lim 6372  df-suc 6373  df-iota 6499  df-fun 6545  df-fn 6546  df-f 6547  df-f1 6548  df-fo 6549  df-f1o 6550  df-fv 6551  df-ov 7426  df-oprab 7427  df-mpo 7428  df-om 7872  df-2nd 7996  df-frecs 8287  df-wrecs 8318  df-recs 8367  df-rdg 8406  df-nn 12252  df-sets 17249  df-slot 17267  df-ndx 17279  df-base 17295  df-ress 17316  df-subg 19220  df-abl 19884  df-rng 20262  df-subrng 20682
This theorem is used by: (None)
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