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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 3004 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐶 = 𝐷) |
| 3 | df-ne 2959 | . 2 ⊢ (𝐶 ≠ 𝐷 ↔ ¬ 𝐶 = 𝐷) | |
| 4 | 2, 3 | bitr4i 281 | 1 ⊢ (𝐴 ≠ 𝐵 ↔ 𝐶 ≠ 𝐷) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 209 = wceq 1570 ≠ wne 2958 |
| 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 210 df-ne 2959 |
| This theorem is referenced by: necom 3011 neeq1i 3022 neeq2i 3023 neeq12i 3024 rnsnn0 6211 onoviun 8331 onnseq 8332 intrnfi 9377 wdomtr 9538 noinfep 9630 wemapwe 9667 scott0s 9863 cplem1 9876 karden 9882 acndom2 10039 dfac5lem3 10110 fin23lem31 10328 fin23lem40 10336 isf34lem5 10363 isf34lem7 10364 isf34lem6 10365 axrrecex 11149 negne0bi 11532 rpnnen1lem4 13005 rpnnen1lem5 13006 fseqsupcl 14015 limsupgre 15534 isercolllem3 15720 rpnnen2lem12 16282 ruclem11 16297 3dvds 16390 prmreclem6 16982 0ram 17081 0ram2 17082 0ramcl 17084 gsumval2 18745 ghmrn 19300 gexex 19924 gsumval3 19978 subdrgint 20887 iinopn 23040 cnconn 23560 1stcfb 23583 qtopeu 23854 fbasrn 24022 alexsublem 24182 evth 25099 minveclem1 25564 minveclem3b 25568 ovollb2 25629 ovolunlem1a 25636 ovolunlem1 25637 ovoliunlem1 25642 ovoliun2 25646 ioombl1lem4 25701 uniioombllem1 25721 uniioombllem2 25723 uniioombllem6 25728 mbfsup 25804 mbfinf 25805 mbflimsup 25806 itg1climres 25854 itg2monolem1 25890 itg2mono 25893 itg2i1fseq2 25896 sincos4thpi 26659 nosepnelem 27824 axlowdimlem13 29285 eulerpath 30573 siii 31186 minvecolem1 31207 bcsiALT 31512 h1de2bi 31887 h1de2ctlem 31888 nmlnopgt0i 32330 wrdpmtrlast 33394 dimval 33972 dimvalfi 33973 rge0scvg 34320 rankscott 35503 kardeq0 35550 umgracycusgr 35627 cusgracyclt3v 35629 erdszelem5 35668 cvmsss2 35747 elrn3 36235 rankeq1o 36644 ttc0elw 37019 ttc0el 37027 regsfromunir1 37032 fin2so 38239 heicant 38287 scottn0f 38800 psspwb 42980 fnwe2lem2 43761 sqrtcval 44350 |
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