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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 2981 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐶 = 𝐷) |
| 3 | df-ne 2936 | . 2 ⊢ (𝐶 ≠ 𝐷 ↔ ¬ 𝐶 = 𝐷) | |
| 4 | 2, 3 | bitr4i 279 | 1 ⊢ (𝐴 ≠ 𝐵 ↔ 𝐶 ≠ 𝐷) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 207 = wceq 1547 ≠ wne 2935 |
| 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 208 df-ne 2936 |
| This theorem is referenced by: necom 2988 neeq1i 2999 neeq2i 3000 neeq12i 3001 rnsnn0 6166 onoviun 8280 onnseq 8281 intrnfi 9326 wdomtr 9487 noinfep 9579 wemapwe 9616 scott0s 9810 cplem1 9811 karden 9817 acndom2 9974 dfac5lem3 10045 fin23lem31 10263 fin23lem40 10271 isf34lem5 10298 isf34lem7 10299 isf34lem6 10300 axrrecex 11084 negne0bi 11465 rpnnen1lem4 12928 rpnnen1lem5 12929 fseqsupcl 13937 limsupgre 15441 isercolllem3 15627 rpnnen2lem12 16190 ruclem11 16205 3dvds 16298 prmreclem6 16890 0ram 16989 0ram2 16990 0ramcl 16992 gsumval2 18652 ghmrn 19202 gexex 19826 gsumval3 19880 subdrgint 20782 iinopn 22892 cnconn 23412 1stcfb 23435 qtopeu 23706 fbasrn 23874 alexsublem 24034 evth 24951 minveclem1 25416 minveclem3b 25420 ovollb2 25481 ovolunlem1a 25488 ovolunlem1 25489 ovoliunlem1 25494 ovoliun2 25498 ioombl1lem4 25553 uniioombllem1 25573 uniioombllem2 25575 uniioombllem6 25580 mbfsup 25656 mbfinf 25657 mbflimsup 25658 itg1climres 25706 itg2monolem1 25742 itg2mono 25745 itg2i1fseq2 25748 sincos4thpi 26502 nosepnelem 27668 axlowdimlem13 29048 eulerpath 30336 siii 30949 minvecolem1 30970 bcsiALT 31275 h1de2bi 31650 h1de2ctlem 31651 nmlnopgt0i 32093 wrdpmtrlast 33181 dimval 33792 dimvalfi 33793 rge0scvg 34140 umgracycusgr 35389 cusgracyclt3v 35391 erdszelem5 35430 cvmsss2 35509 elrn3 35997 rankeq1o 36406 ttc0elw 36762 ttc0el 36770 regsfromunir1 36775 fin2so 37981 heicant 38029 scottn0f 38544 psspwb 42722 fnwe2lem2 43503 sqrtcval 44092 |
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