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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 2851 | . 2 ⊢ (𝑅 = 𝑆 → (〈𝐴, 𝐵〉 ∈ 𝑅 ↔ 〈𝐴, 𝐵〉 ∈ 𝑆)) | |
| 2 | df-br 5109 | . 2 ⊢ (𝐴𝑅𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑅) | |
| 3 | df-br 5109 | . 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 1569 ∈ wcel 2142 〈cop 4594 class class class wbr 5108 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-ext 2734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-ex 1809 df-cleq 2754 df-clel 2837 df-br 5109 |
| This theorem is used by: breqi 5114 breqd 5119 poeq1 5571 soeq1 5589 freq1 5627 fveq1 6880 foeqcnvco 7298 f1eqcocnv 7299 isoeq2 7316 isoeq3 7317 eqfunresadj 7360 brfvopab 7469 ofreq 7680 supeq3 9407 oieq1 9472 ttrcleq 9676 dcomex 10437 axdc2lem 10438 brdom3 10518 brdom7disj 10521 brdom6disj 10522 dfrtrclrec2 15102 relexpindlem 15107 rtrclind 15109 shftfval 15114 isprs 18358 isdrs 18363 ispos 18376 istos 18478 resspos 18491 chneq1 18674 efglem 19792 frgpuplem 19848 ordtval 23357 utop2nei 24418 utop3cls 24419 isucn2 24446 ucnima 24448 iducn 24450 ex-opab 30794 acycgr0v 35648 prclisacycgr 35651 satf 35853 cureq 38275 poimirlem31 38330 poimir 38332 cosseq 39193 elrefrels3 39276 elcnvrefrels3 39292 elsymrels3 39315 elsymrels5 39317 eltrrels3 39341 eleqvrels3 39354 brabsb2 39664 rfovfvd 44756 fsovrfovd 44763 relpeq2 45682 relpeq3 45683 sprsymrelf 48272 sprsymrelfo 48274 upwlkbprop 48931 |
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