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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 1542 ≠ 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 6172 onoviun 8283 onnseq 8284 intrnfi 9329 wdomtr 9490 noinfep 9581 wemapwe 9618 scott0s 9812 cplem1 9813 karden 9819 acndom2 9976 dfac5lem3 10047 fin23lem31 10265 fin23lem40 10273 isf34lem5 10300 isf34lem7 10301 isf34lem6 10302 axrrecex 11086 negne0bi 11467 rpnnen1lem4 12930 rpnnen1lem5 12931 fseqsupcl 13939 limsupgre 15443 isercolllem3 15629 rpnnen2lem12 16192 ruclem11 16207 3dvds 16300 prmreclem6 16892 0ram 16991 0ram2 16992 0ramcl 16994 gsumval2 18654 ghmrn 19204 gexex 19828 gsumval3 19882 subdrgint 20780 iinopn 22867 cnconn 23387 1stcfb 23410 qtopeu 23681 fbasrn 23849 alexsublem 24009 evth 24926 minveclem1 25391 minveclem3b 25395 ovollb2 25456 ovolunlem1a 25463 ovolunlem1 25464 ovoliunlem1 25469 ovoliun2 25473 ioombl1lem4 25528 uniioombllem1 25548 uniioombllem2 25550 uniioombllem6 25555 mbfsup 25631 mbfinf 25632 mbflimsup 25633 itg1climres 25681 itg2monolem1 25717 itg2mono 25720 itg2i1fseq2 25723 sincos4thpi 26477 nosepnelem 27643 axlowdimlem13 29023 eulerpath 30311 siii 30924 minvecolem1 30945 bcsiALT 31250 h1de2bi 31625 h1de2ctlem 31626 nmlnopgt0i 32068 wrdpmtrlast 33154 dimval 33745 dimvalfi 33746 rge0scvg 34093 umgracycusgr 35336 cusgracyclt3v 35338 erdszelem5 35377 cvmsss2 35456 elrn3 35944 rankeq1o 36353 ttc0elw 36709 ttc0el 36717 regsfromunir1 36722 fin2so 37928 heicant 37976 scottn0f 38491 psspwb 42669 fnwe2lem2 43479 sqrtcval 44068 |
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