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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 5113 | . . . 4 ⊢ (𝐴 = 𝐵 → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐶)) | |
2 | 1 | biimpcd 248 | . . 3 ⊢ (𝐴𝑅𝐶 → (𝐴 = 𝐵 → 𝐵𝑅𝐶)) |
3 | 2 | necon3bd 2953 | . 2 ⊢ (𝐴𝑅𝐶 → (¬ 𝐵𝑅𝐶 → 𝐴 ≠ 𝐵)) |
4 | 3 | imp 407 | 1 ⊢ ((𝐴𝑅𝐶 ∧ ¬ 𝐵𝑅𝐶) → 𝐴 ≠ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 = wceq 1541 ≠ wne 2939 class class class wbr 5110 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-ext 2702 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-sb 2068 df-clab 2709 df-cleq 2723 df-clel 2809 df-ne 2940 df-rab 3406 df-v 3448 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4288 df-if 4492 df-sn 4592 df-pr 4594 df-op 4598 df-br 5111 |
This theorem is referenced by: frfi 9239 ablsimpgfindlem1 19900 ablsimpgfindlem2 19901 hl2at 37941 2atjm 37981 atbtwn 37982 atbtwnexOLDN 37983 atbtwnex 37984 dalem21 38230 dalem23 38232 dalem27 38235 dalem54 38262 2llnma1b 38322 lhpexle1lem 38543 lhpexle3lem 38547 lhp2at0nle 38571 4atexlemunv 38602 4atexlemnclw 38606 4atexlemcnd 38608 cdlemc5 38731 cdleme0b 38748 cdleme0c 38749 cdleme0fN 38754 cdleme01N 38757 cdleme0ex2N 38760 cdleme3b 38765 cdleme3c 38766 cdleme3g 38770 cdleme3h 38771 cdleme7aa 38778 cdleme7b 38780 cdleme7c 38781 cdleme7d 38782 cdleme7e 38783 cdleme7ga 38784 cdleme11fN 38800 cdlemesner 38832 cdlemednpq 38835 cdleme19a 38839 cdleme19c 38841 cdleme21c 38863 cdleme21ct 38865 cdleme22cN 38878 cdleme22f2 38883 cdleme22g 38884 cdleme41sn3aw 39010 cdlemeg46rgv 39064 cdlemeg46req 39065 cdlemf1 39097 cdlemg27b 39232 cdlemg33b0 39237 cdlemg33c0 39238 cdlemh 39353 cdlemk14 39390 dia2dimlem1 39600 |
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