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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 3005 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐶 = 𝐷) |
| 3 | df-ne 2960 | . 2 ⊢ (𝐶 ≠ 𝐷 ↔ ¬ 𝐶 = 𝐷) | |
| 4 | 2, 3 | bitr4i 281 | 1 ⊢ (𝐴 ≠ 𝐵 ↔ 𝐶 ≠ 𝐷) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ↔ wb 209 = wceq 1570 ≠ wne 2959 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
| This proof depends on definitions: df-bi 210 df-ne 2960 |
| This theorem is used by: necom 3012 neeq1i 3023 neeq2i 3024 neeq12i 3025 rnsnn0 6223 onoviun 8382 onnseq 8383 intrnfi 9438 wdomtr 9599 noinfep 9691 wemapwe 9728 scott0bs 9974 scott0bsOLD 9975 cplem1 9980 cplem1OLD 9981 karden 9989 kardenOLD 9990 acndom2 10163 dfac5lem3 10234 fin23lem31 10451 fin23lem40 10459 isf34lem5 10486 isf34lem7 10487 isf34lem6 10488 axrrecex 11278 negne0bi 11661 rpnnen1lem4 13138 rpnnen1lem5 13139 fseqsupcl 14150 limsupgre 15680 isercolllem3 15866 rpnnen2lem12 16425 ruclem11 16440 3dvds 16533 prmreclem6 17131 0ram 17230 0ram2 17231 0ramcl 17233 gsumval2 18907 ghmrn 19475 gexex 20100 gsumval3 20154 subdrgint 21093 iinopn 23253 cnconn 23773 1stcfb 23796 qtopeu 24068 fbasrn 24236 alexsublem 24396 evth 25313 minveclem1 25778 minveclem3b 25782 ovollb2 25843 ovolunlem1a 25850 ovolunlem1 25851 ovoliunlem1 25856 ovoliun2 25860 ioombl1lem4 25915 uniioombllem1 25935 uniioombllem2 25937 uniioombllem6 25942 mbfsup 26018 mbfinf 26019 mbflimsup 26020 itg1climres 26068 itg2monolem1 26104 itg2mono 26107 itg2i1fseq2 26110 sincos4thpi 26875 nosepnelem 28069 axlowdimlem13 29565 eulerpath 30875 siii 31488 minvecolem1 31509 bcsiALT 31814 h1de2bi 32189 h1de2ctlem 32190 nmlnopgt0i 32632 wrdpmtrlast 33730 dimval 34316 dimvalfi 34317 rge0scvg 34664 elscottn0 35849 rankscott 35851 ecscottd 35857 kardeq0 35937 umgracycusgr 36089 cusgracyclt3v 36091 erdszelem5 36140 cvmsss2 36219 elrn3 36718 rankeq1o 37123 ttc0elw 37506 ttc0el 37514 regsfromunir1 37519 fin2so 38735 heicant 38778 scottn0f 39305 psspwb 43486 sqrtcval 44844 |
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