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| Mirrors > Home > MPE Home > Th. List > breq12i | Structured version Visualization version GIF version | ||
| Description: Equality inference for a binary relation. (Contributed by NM, 8-Feb-1996.) (Proof shortened by Eric Schmidt, 4-Apr-2007.) |
| Ref | Expression |
|---|---|
| breq1i.1 | ⊢ 𝐴 = 𝐵 |
| breq12i.2 | ⊢ 𝐶 = 𝐷 |
| Ref | Expression |
|---|---|
| breq12i | ⊢ (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | breq1i.1 | . 2 ⊢ 𝐴 = 𝐵 | |
| 2 | breq12i.2 | . 2 ⊢ 𝐶 = 𝐷 | |
| 3 | breq12 5113 | . 2 ⊢ ((𝐴 = 𝐵 ∧ 𝐶 = 𝐷) → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐷)) | |
| 4 | 1, 2, 3 | mp2an 704 | 1 ⊢ (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐷) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 = wceq 1569 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-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-sb 2096 df-clab 2741 df-cleq 2754 df-clel 2837 df-rab 3416 df-v 3456 df-dif 3907 df-un 3909 df-ss 3921 df-nul 4286 df-if 4487 df-sn 4589 df-pr 4591 df-op 4595 df-br 5109 |
| This theorem is used by: 3brtr3g 5143 3brtr4g 5144 caovord2 7624 domunfican 9279 ltsonq 10960 ltanq 10962 ltmnq 10963 prlem934 11024 prlem936 11038 ltsosr 11085 ltasr 11091 ltneg 11720 leneg 11723 lt2sqi 14232 le2sqi 14233 nn0le2msqi 14310 2sqreuop 27637 2sqreuopnn 27638 2sqreuoplt 27639 2sqreuopltb 27640 2sqreuopnnlt 27641 2sqreuopnnltb 27642 axlowdimlem6 29308 upgrwlkcompim 30003 clwlkcompbp 30142 mdsldmd1i 32694 fldext2chn 34127 constrextdg2lem 34147 divcnvlin 36233 ditgeq123i 36749 cbvditgvw2 36789 relowlpssretop 38038 2ap1caineq 42940 fsumlessf 46321 climlimsupcex 46511 liminfltlimsupex 46523 liminflelimsupcex 46539 sge0xaddlem2 47176 eubrdm 47801 isgrlim2 48776 iscmgmALT 49017 iscsgrpALT 49019 |
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