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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 2974 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐶 = 𝐷) |
| 3 | df-ne 2929 | . 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 1541 ≠ wne 2928 |
| 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 2929 |
| This theorem is referenced by: necom 2981 neeq1i 2992 neeq2i 2993 neeq12i 2994 rnsnn0 6155 onoviun 8263 onnseq 8264 intrnfi 9300 wdomtr 9461 noinfep 9550 wemapwe 9587 scott0s 9781 cplem1 9782 karden 9788 acndom2 9945 dfac5lem3 10016 fin23lem31 10234 fin23lem40 10242 isf34lem5 10269 isf34lem7 10270 isf34lem6 10271 axrrecex 11054 negne0bi 11434 rpnnen1lem4 12878 rpnnen1lem5 12879 fseqsupcl 13884 limsupgre 15388 isercolllem3 15574 rpnnen2lem12 16134 ruclem11 16149 3dvds 16242 prmreclem6 16833 0ram 16932 0ram2 16933 0ramcl 16935 gsumval2 18594 ghmrn 19141 gexex 19765 gsumval3 19819 subdrgint 20718 iinopn 22817 cnconn 23337 1stcfb 23360 qtopeu 23631 fbasrn 23799 alexsublem 23959 evth 24885 minveclem1 25351 minveclem3b 25355 ovollb2 25417 ovolunlem1a 25424 ovolunlem1 25425 ovoliunlem1 25430 ovoliun2 25434 ioombl1lem4 25489 uniioombllem1 25509 uniioombllem2 25511 uniioombllem6 25516 mbfsup 25592 mbfinf 25593 mbflimsup 25594 itg1climres 25642 itg2monolem1 25678 itg2mono 25681 itg2i1fseq2 25684 sincos4thpi 26449 nosepnelem 27618 axlowdimlem13 28932 eulerpath 30221 siii 30833 minvecolem1 30854 bcsiALT 31159 h1de2bi 31534 h1de2ctlem 31535 nmlnopgt0i 31977 wrdpmtrlast 33062 dimval 33613 dimvalfi 33614 rge0scvg 33962 umgracycusgr 35198 cusgracyclt3v 35200 erdszelem5 35239 cvmsss2 35318 elrn3 35806 rankeq1o 36215 fin2so 37646 heicant 37694 scottn0f 38209 psspwb 42320 fnwe2lem2 43143 sqrtcval 43733 |
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