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Mirrors > Home > MPE Home > Th. List > nbrne2 | Structured version Visualization version GIF version |
Description: Two classes are different if they don't have the same relationship to a third class. (Contributed by NM, 3-Jun-2012.) |
Ref | Expression |
---|---|
nbrne2 | ⊢ ((𝐴𝑅𝐶 ∧ ¬ 𝐵𝑅𝐶) → 𝐴 ≠ 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq1 4656 | . . . 4 ⊢ (𝐴 = 𝐵 → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐶)) | |
2 | 1 | biimpcd 239 | . . 3 ⊢ (𝐴𝑅𝐶 → (𝐴 = 𝐵 → 𝐵𝑅𝐶)) |
3 | 2 | necon3bd 2808 | . 2 ⊢ (𝐴𝑅𝐶 → (¬ 𝐵𝑅𝐶 → 𝐴 ≠ 𝐵)) |
4 | 3 | imp 445 | 1 ⊢ ((𝐴𝑅𝐶 ∧ ¬ 𝐵𝑅𝐶) → 𝐴 ≠ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 384 = wceq 1483 ≠ wne 2794 class class class wbr 4653 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-br 4654 |
This theorem is referenced by: frfi 8205 hl2at 34691 2atjm 34731 atbtwn 34732 atbtwnexOLDN 34733 atbtwnex 34734 dalem21 34980 dalem23 34982 dalem27 34985 dalem54 35012 2llnma1b 35072 lhpexle1lem 35293 lhpexle3lem 35297 lhp2at0nle 35321 4atexlemunv 35352 4atexlemnclw 35356 4atexlemcnd 35358 cdlemc5 35482 cdleme0b 35499 cdleme0c 35500 cdleme0fN 35505 cdleme01N 35508 cdleme0ex2N 35511 cdleme3b 35516 cdleme3c 35517 cdleme3g 35521 cdleme3h 35522 cdleme7aa 35529 cdleme7b 35531 cdleme7c 35532 cdleme7d 35533 cdleme7e 35534 cdleme7ga 35535 cdleme11fN 35551 cdlemesner 35583 cdlemednpq 35586 cdleme19a 35591 cdleme19c 35593 cdleme21c 35615 cdleme21ct 35617 cdleme22cN 35630 cdleme22f2 35635 cdleme22g 35636 cdleme41sn3aw 35762 cdlemeg46rgv 35816 cdlemeg46req 35817 cdlemf1 35849 cdlemg27b 35984 cdlemg33b0 35989 cdlemg33c0 35990 cdlemh 36105 cdlemk14 36142 dia2dimlem1 36353 |
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