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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 5055 | . . . 4 ⊢ (𝐴 = 𝐵 → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐶)) | |
2 | 1 | biimpcd 251 | . . 3 ⊢ (𝐴𝑅𝐶 → (𝐴 = 𝐵 → 𝐵𝑅𝐶)) |
3 | 2 | necon3bd 3030 | . 2 ⊢ (𝐴𝑅𝐶 → (¬ 𝐵𝑅𝐶 → 𝐴 ≠ 𝐵)) |
4 | 3 | imp 409 | 1 ⊢ ((𝐴𝑅𝐶 ∧ ¬ 𝐵𝑅𝐶) → 𝐴 ≠ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 398 = wceq 1537 ≠ wne 3016 class class class wbr 5052 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-rab 3147 df-v 3488 df-dif 3927 df-un 3929 df-in 3931 df-ss 3940 df-nul 4280 df-if 4454 df-sn 4554 df-pr 4556 df-op 4560 df-br 5053 |
This theorem is referenced by: frfi 8749 ablsimpgfindlem1 19212 ablsimpgfindlem2 19213 hl2at 36573 2atjm 36613 atbtwn 36614 atbtwnexOLDN 36615 atbtwnex 36616 dalem21 36862 dalem23 36864 dalem27 36867 dalem54 36894 2llnma1b 36954 lhpexle1lem 37175 lhpexle3lem 37179 lhp2at0nle 37203 4atexlemunv 37234 4atexlemnclw 37238 4atexlemcnd 37240 cdlemc5 37363 cdleme0b 37380 cdleme0c 37381 cdleme0fN 37386 cdleme01N 37389 cdleme0ex2N 37392 cdleme3b 37397 cdleme3c 37398 cdleme3g 37402 cdleme3h 37403 cdleme7aa 37410 cdleme7b 37412 cdleme7c 37413 cdleme7d 37414 cdleme7e 37415 cdleme7ga 37416 cdleme11fN 37432 cdlemesner 37464 cdlemednpq 37467 cdleme19a 37471 cdleme19c 37473 cdleme21c 37495 cdleme21ct 37497 cdleme22cN 37510 cdleme22f2 37515 cdleme22g 37516 cdleme41sn3aw 37642 cdlemeg46rgv 37696 cdlemeg46req 37697 cdlemf1 37729 cdlemg27b 37864 cdlemg33b0 37869 cdlemg33c0 37870 cdlemh 37985 cdlemk14 38022 dia2dimlem1 38232 |
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