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| Mirrors > Home > MPE Home > Th. List > dfric2 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of the ring isomorphism relation. (Contributed by Jeff Madsen, 16-Jun-2011.) (Revised by AV, 23-Aug-2026.) |
| Ref | Expression |
|---|---|
| dfric2 | ⊢ ≃𝑟 = {〈𝑟, 𝑠〉 ∣ ((𝑟 ∈ Ring ∧ 𝑠 ∈ Ring) ∧ ∃𝑓 𝑓 ∈ (𝑟 RingIso 𝑠))} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isbrric2 20780 | . . . . 5 ⊢ (𝑟 ≃𝑟 𝑠 ↔ ((𝑟 ∈ Ring ∧ 𝑠 ∈ Ring) ∧ ∃𝑓 𝑓 ∈ (𝑟 RingIso 𝑠))) | |
| 2 | 1 | anbi2i 635 | . . . 4 ⊢ ((𝑥 = 〈𝑟, 𝑠〉 ∧ 𝑟 ≃𝑟 𝑠) ↔ (𝑥 = 〈𝑟, 𝑠〉 ∧ ((𝑟 ∈ Ring ∧ 𝑠 ∈ Ring) ∧ ∃𝑓 𝑓 ∈ (𝑟 RingIso 𝑠)))) |
| 3 | 2 | 2exbii 1882 | . . 3 ⊢ (∃𝑟∃𝑠(𝑥 = 〈𝑟, 𝑠〉 ∧ 𝑟 ≃𝑟 𝑠) ↔ ∃𝑟∃𝑠(𝑥 = 〈𝑟, 𝑠〉 ∧ ((𝑟 ∈ Ring ∧ 𝑠 ∈ Ring) ∧ ∃𝑓 𝑓 ∈ (𝑟 RingIso 𝑠)))) |
| 4 | ricrel 20771 | . . . 4 ⊢ Rel ≃𝑟 | |
| 5 | elrelb 5780 | . . . 4 ⊢ (Rel ≃𝑟 → (𝑥 ∈ ≃𝑟 ↔ ∃𝑟∃𝑠(𝑥 = 〈𝑟, 𝑠〉 ∧ 𝑟 ≃𝑟 𝑠))) | |
| 6 | 4, 5 | ax-mp 5 | . . 3 ⊢ (𝑥 ∈ ≃𝑟 ↔ ∃𝑟∃𝑠(𝑥 = 〈𝑟, 𝑠〉 ∧ 𝑟 ≃𝑟 𝑠)) |
| 7 | elopab 5505 | . . 3 ⊢ (𝑥 ∈ {〈𝑟, 𝑠〉 ∣ ((𝑟 ∈ Ring ∧ 𝑠 ∈ Ring) ∧ ∃𝑓 𝑓 ∈ (𝑟 RingIso 𝑠))} ↔ ∃𝑟∃𝑠(𝑥 = 〈𝑟, 𝑠〉 ∧ ((𝑟 ∈ Ring ∧ 𝑠 ∈ Ring) ∧ ∃𝑓 𝑓 ∈ (𝑟 RingIso 𝑠)))) | |
| 8 | 3, 6, 7 | 3bitr4i 306 | . 2 ⊢ (𝑥 ∈ ≃𝑟 ↔ 𝑥 ∈ {〈𝑟, 𝑠〉 ∣ ((𝑟 ∈ Ring ∧ 𝑠 ∈ Ring) ∧ ∃𝑓 𝑓 ∈ (𝑟 RingIso 𝑠))}) |
| 9 | 8 | eqriv 2760 | 1 ⊢ ≃𝑟 = {〈𝑟, 𝑠〉 ∣ ((𝑟 ∈ Ring ∧ 𝑠 ∈ Ring) ∧ ∃𝑓 𝑓 ∈ (𝑟 RingIso 𝑠))} |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1570 ∃wex 1812 ∈ wcel 2147 〈cop 4838 class class class wbr 5106 {copab 5170 Rel wrel 5660 (class class class)co 7440 Ringcrg 20486 RingIso crs 20727 ≃𝑟 cric 20728 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-lim 6382 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-om 7899 df-1st 8022 df-2nd 8023 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-rdg 8443 df-1o 8501 df-er 8742 df-map 8874 df-en 8999 df-dom 9000 df-sdom 9001 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-nn 12360 df-2 12429 df-sets 17368 df-slot 17386 df-ndx 17398 df-base 17414 df-plusg 17467 df-0g 17638 df-mhm 19004 df-ghm 19454 df-mgp 20388 df-ur 20435 df-ring 20488 df-rhm 20729 df-rim 20730 df-ric 20770 |
| This theorem is used by: (None) |
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