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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 5088 | . . . 4 ⊢ (𝐴 = 𝐵 → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐶)) | |
| 2 | 1 | biimpcd 249 | . . 3 ⊢ (𝐴𝑅𝐶 → (𝐴 = 𝐵 → 𝐵𝑅𝐶)) |
| 3 | 2 | necon3bd 2946 | . 2 ⊢ (𝐴𝑅𝐶 → (¬ 𝐵𝑅𝐶 → 𝐴 ≠ 𝐵)) |
| 4 | 3 | imp 406 | 1 ⊢ ((𝐴𝑅𝐶 ∧ ¬ 𝐵𝑅𝐶) → 𝐴 ≠ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1542 ≠ wne 2932 class class class wbr 5085 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-br 5086 |
| This theorem is referenced by: frfi 9195 ablsimpgfindlem1 20084 ablsimpgfindlem2 20085 hl2at 39851 2atjm 39891 atbtwn 39892 atbtwnexOLDN 39893 atbtwnex 39894 dalem21 40140 dalem23 40142 dalem27 40145 dalem54 40172 2llnma1b 40232 lhpexle1lem 40453 lhpexle3lem 40457 lhp2at0nle 40481 4atexlemunv 40512 4atexlemnclw 40516 4atexlemcnd 40518 cdlemc5 40641 cdleme0b 40658 cdleme0c 40659 cdleme0fN 40664 cdleme01N 40667 cdleme0ex2N 40670 cdleme3b 40675 cdleme3c 40676 cdleme3g 40680 cdleme3h 40681 cdleme7aa 40688 cdleme7b 40690 cdleme7c 40691 cdleme7d 40692 cdleme7e 40693 cdleme7ga 40694 cdleme11fN 40710 cdlemesner 40742 cdlemednpq 40745 cdleme19a 40749 cdleme19c 40751 cdleme21c 40773 cdleme21ct 40775 cdleme22cN 40788 cdleme22f2 40793 cdleme22g 40794 cdleme41sn3aw 40920 cdlemeg46rgv 40974 cdlemeg46req 40975 cdlemf1 41007 cdlemg27b 41142 cdlemg33b0 41147 cdlemg33c0 41148 cdlemh 41263 cdlemk14 41300 dia2dimlem1 41510 |
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