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| Mirrors > Home > MPE Home > Th. List > necon3bii | Structured version Visualization version GIF version | ||
| Description: Inference from equality to inequality. (Contributed by NM, 23-Feb-2005.) |
| Ref | Expression |
|---|---|
| necon3bii.1 | ⊢ (𝐴 = 𝐵 ↔ 𝐶 = 𝐷) |
| Ref | Expression |
|---|---|
| necon3bii | ⊢ (𝐴 ≠ 𝐵 ↔ 𝐶 ≠ 𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | necon3bii.1 | . . 3 ⊢ (𝐴 = 𝐵 ↔ 𝐶 = 𝐷) | |
| 2 | 1 | necon3abii 2978 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐶 = 𝐷) |
| 3 | df-ne 2933 | . 2 ⊢ (𝐶 ≠ 𝐷 ↔ ¬ 𝐶 = 𝐷) | |
| 4 | 2, 3 | bitr4i 278 | 1 ⊢ (𝐴 ≠ 𝐵 ↔ 𝐶 ≠ 𝐷) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 206 = wceq 1541 ≠ wne 2932 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
| This theorem depends on definitions: df-bi 207 df-ne 2933 |
| This theorem is referenced by: necom 2985 neeq1i 2996 neeq2i 2997 neeq12i 2998 rnsnn0 6166 onoviun 8275 onnseq 8276 intrnfi 9319 wdomtr 9480 noinfep 9569 wemapwe 9606 scott0s 9800 cplem1 9801 karden 9807 acndom2 9964 dfac5lem3 10035 fin23lem31 10253 fin23lem40 10261 isf34lem5 10288 isf34lem7 10289 isf34lem6 10290 axrrecex 11074 negne0bi 11454 rpnnen1lem4 12893 rpnnen1lem5 12894 fseqsupcl 13900 limsupgre 15404 isercolllem3 15590 rpnnen2lem12 16150 ruclem11 16165 3dvds 16258 prmreclem6 16849 0ram 16948 0ram2 16949 0ramcl 16951 gsumval2 18611 ghmrn 19158 gexex 19782 gsumval3 19836 subdrgint 20736 iinopn 22846 cnconn 23366 1stcfb 23389 qtopeu 23660 fbasrn 23828 alexsublem 23988 evth 24914 minveclem1 25380 minveclem3b 25384 ovollb2 25446 ovolunlem1a 25453 ovolunlem1 25454 ovoliunlem1 25459 ovoliun2 25463 ioombl1lem4 25518 uniioombllem1 25538 uniioombllem2 25540 uniioombllem6 25545 mbfsup 25621 mbfinf 25622 mbflimsup 25623 itg1climres 25671 itg2monolem1 25707 itg2mono 25710 itg2i1fseq2 25713 sincos4thpi 26478 nosepnelem 27647 axlowdimlem13 29027 eulerpath 30316 siii 30928 minvecolem1 30949 bcsiALT 31254 h1de2bi 31629 h1de2ctlem 31630 nmlnopgt0i 32072 wrdpmtrlast 33175 dimval 33757 dimvalfi 33758 rge0scvg 34106 umgracycusgr 35348 cusgracyclt3v 35350 erdszelem5 35389 cvmsss2 35468 elrn3 35956 rankeq1o 36365 regsfromunir1 36670 fin2so 37808 heicant 37856 scottn0f 38371 psspwb 42484 fnwe2lem2 43293 sqrtcval 43882 |
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