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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 5033 | . . . 4 ⊢ (𝐴 = 𝐵 → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐶)) | |
2 | 1 | biimpcd 252 | . . 3 ⊢ (𝐴𝑅𝐶 → (𝐴 = 𝐵 → 𝐵𝑅𝐶)) |
3 | 2 | necon3bd 3001 | . 2 ⊢ (𝐴𝑅𝐶 → (¬ 𝐵𝑅𝐶 → 𝐴 ≠ 𝐵)) |
4 | 3 | imp 410 | 1 ⊢ ((𝐴𝑅𝐶 ∧ ¬ 𝐵𝑅𝐶) → 𝐴 ≠ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 = wceq 1538 ≠ wne 2987 class class class wbr 5030 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-ne 2988 df-v 3443 df-un 3886 df-sn 4526 df-pr 4528 df-op 4532 df-br 5031 |
This theorem is referenced by: frfi 8747 ablsimpgfindlem1 19222 ablsimpgfindlem2 19223 hl2at 36701 2atjm 36741 atbtwn 36742 atbtwnexOLDN 36743 atbtwnex 36744 dalem21 36990 dalem23 36992 dalem27 36995 dalem54 37022 2llnma1b 37082 lhpexle1lem 37303 lhpexle3lem 37307 lhp2at0nle 37331 4atexlemunv 37362 4atexlemnclw 37366 4atexlemcnd 37368 cdlemc5 37491 cdleme0b 37508 cdleme0c 37509 cdleme0fN 37514 cdleme01N 37517 cdleme0ex2N 37520 cdleme3b 37525 cdleme3c 37526 cdleme3g 37530 cdleme3h 37531 cdleme7aa 37538 cdleme7b 37540 cdleme7c 37541 cdleme7d 37542 cdleme7e 37543 cdleme7ga 37544 cdleme11fN 37560 cdlemesner 37592 cdlemednpq 37595 cdleme19a 37599 cdleme19c 37601 cdleme21c 37623 cdleme21ct 37625 cdleme22cN 37638 cdleme22f2 37643 cdleme22g 37644 cdleme41sn3aw 37770 cdlemeg46rgv 37824 cdlemeg46req 37825 cdlemf1 37857 cdlemg27b 37992 cdlemg33b0 37997 cdlemg33c0 37998 cdlemh 38113 cdlemk14 38150 dia2dimlem1 38360 |
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