| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5092 | . . . 4 ⊢ (𝐴 = 𝐵 → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐶)) | |
| 2 | 1 | biimpcd 249 | . . 3 ⊢ (𝐴𝑅𝐶 → (𝐴 = 𝐵 → 𝐵𝑅𝐶)) |
| 3 | 2 | necon3bd 2940 | . 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 1541 ≠ wne 2926 class class class wbr 5089 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2112 ax-9 2120 ax-ext 2702 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2067 df-clab 2709 df-cleq 2722 df-clel 2804 df-ne 2927 df-rab 3394 df-v 3436 df-dif 3903 df-un 3905 df-ss 3917 df-nul 4282 df-if 4474 df-sn 4575 df-pr 4577 df-op 4581 df-br 5090 |
| This theorem is referenced by: frfi 9164 ablsimpgfindlem1 20014 ablsimpgfindlem2 20015 hl2at 39423 2atjm 39463 atbtwn 39464 atbtwnexOLDN 39465 atbtwnex 39466 dalem21 39712 dalem23 39714 dalem27 39717 dalem54 39744 2llnma1b 39804 lhpexle1lem 40025 lhpexle3lem 40029 lhp2at0nle 40053 4atexlemunv 40084 4atexlemnclw 40088 4atexlemcnd 40090 cdlemc5 40213 cdleme0b 40230 cdleme0c 40231 cdleme0fN 40236 cdleme01N 40239 cdleme0ex2N 40242 cdleme3b 40247 cdleme3c 40248 cdleme3g 40252 cdleme3h 40253 cdleme7aa 40260 cdleme7b 40262 cdleme7c 40263 cdleme7d 40264 cdleme7e 40265 cdleme7ga 40266 cdleme11fN 40282 cdlemesner 40314 cdlemednpq 40317 cdleme19a 40321 cdleme19c 40323 cdleme21c 40345 cdleme21ct 40347 cdleme22cN 40360 cdleme22f2 40365 cdleme22g 40366 cdleme41sn3aw 40492 cdlemeg46rgv 40546 cdlemeg46req 40547 cdlemf1 40579 cdlemg27b 40714 cdlemg33b0 40719 cdlemg33c0 40720 cdlemh 40835 cdlemk14 40872 dia2dimlem1 41082 |
| Copyright terms: Public domain | W3C validator |