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| Mirrors > Home > MPE Home > Th. List > breq | Structured version Visualization version GIF version | ||
| Description: Equality theorem for binary relations. (Contributed by NM, 4-Jun-1995.) |
| Ref | Expression |
|---|---|
| breq | ⊢ (𝑅 = 𝑆 → (𝐴𝑅𝐵 ↔ 𝐴𝑆𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq2 2849 | . 2 ⊢ (𝑅 = 𝑆 → (〈𝐴, 𝐵〉 ∈ 𝑅 ↔ 〈𝐴, 𝐵〉 ∈ 𝑆)) | |
| 2 | df-br 5104 | . 2 ⊢ (𝐴𝑅𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑅) | |
| 3 | df-br 5104 | . 2 ⊢ (𝐴𝑆𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑆) | |
| 4 | 1, 2, 3 | 3bitr4g 317 | 1 ⊢ (𝑅 = 𝑆 → (𝐴𝑅𝐵 ↔ 𝐴𝑆𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 〈cop 4590 class class class wbr 5103 |
| 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 2147 ax-9 2155 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2752 df-clel 2835 df-br 5104 |
| This theorem is used by: breqi 5109 breqd 5114 poeq1 5559 soeq1 5577 freq1 5615 fveq1 6873 foeqcnvco 7297 f1eqcocnv 7298 isoeq2 7315 isoeq3 7316 eqfunresadj 7359 brfvopab 7466 ofreq 7681 cureq 8868 supeq3 9419 oieq1 9484 ttrcleq 9688 dcomex 10482 axdc2lem 10483 brdom3 10564 brdom7disj 10567 brdom6disj 10568 dfrtrclrec2 15164 relexpindlem 15169 rtrclind 15171 shftfval 15176 isprs 18417 isdrs 18422 ispos 18435 istos 18537 resspos 18550 chneq1 18733 efglem 19877 frgpuplem 19933 ordtval 23454 utop2nei 24516 utop3cls 24517 isucn2 24544 ucnima 24546 iducn 24548 ex-opab 30952 acycgr0v 35828 prclisacycgr 35831 satf 36033 poimirlem31 38483 poimir 38485 cosseq 39362 elrefrels3 39445 elcnvrefrels3 39461 elsymrels3 39484 elsymrels5 39486 eltrrels3 39510 eleqvrels3 39523 brabsb2 39833 rfovfvd 44940 fsovrfovd 44947 relpeq2 45866 relpeq3 45867 sprsymrelf 48493 sprsymrelfo 48495 upwlkbprop 49152 |
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