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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 3007 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐶 = 𝐷) |
| 3 | df-ne 2962 | . 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 2961 |
| 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 2962 |
| This theorem is used by: necom 3014 neeq1i 3025 neeq2i 3026 neeq12i 3027 rnsnn0 6214 onoviun 8339 onnseq 8340 intrnfi 9386 wdomtr 9547 noinfep 9639 wemapwe 9676 scott0bs 9883 scott0bsOLD 9884 cplem1 9889 cplem1OLD 9890 karden 9898 kardenOLD 9899 acndom2 10057 dfac5lem3 10128 fin23lem31 10345 fin23lem40 10353 isf34lem5 10380 isf34lem7 10381 isf34lem6 10382 axrrecex 11166 negne0bi 11549 rpnnen1lem4 13022 rpnnen1lem5 13023 fseqsupcl 14033 limsupgre 15558 isercolllem3 15744 rpnnen2lem12 16306 ruclem11 16321 3dvds 16414 prmreclem6 17006 0ram 17105 0ram2 17106 0ramcl 17108 gsumval2 18773 ghmrn 19330 gexex 19954 gsumval3 20008 subdrgint 20943 iinopn 23096 cnconn 23616 1stcfb 23639 qtopeu 23910 fbasrn 24078 alexsublem 24238 evth 25155 minveclem1 25620 minveclem3b 25624 ovollb2 25685 ovolunlem1a 25692 ovolunlem1 25693 ovoliunlem1 25698 ovoliun2 25702 ioombl1lem4 25757 uniioombllem1 25777 uniioombllem2 25779 uniioombllem6 25784 mbfsup 25860 mbfinf 25861 mbflimsup 25862 itg1climres 25910 itg2monolem1 25946 itg2mono 25949 itg2i1fseq2 25952 sincos4thpi 26715 nosepnelem 27880 axlowdimlem13 29341 eulerpath 30629 siii 31242 minvecolem1 31263 bcsiALT 31568 h1de2bi 31943 h1de2ctlem 31944 nmlnopgt0i 32386 wrdpmtrlast 33444 dimval 34022 dimvalfi 34023 rge0scvg 34370 rankscott 35546 kardeq0 35593 umgracycusgr 35667 cusgracyclt3v 35669 erdszelem5 35708 cvmsss2 35787 elrn3 36275 rankeq1o 36684 ttc0elw 37079 ttc0el 37087 regsfromunir1 37092 fin2so 38299 heicant 38347 scottn0f 38860 psspwb 43040 fnwe2lem2 43819 sqrtcval 44408 |
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