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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 3033 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐶 = 𝐷) |
3 | df-ne 2988 | . 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 1538 ≠ wne 2987 |
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 2988 |
This theorem is referenced by: necom 3040 neeq1i 3051 neeq2i 3052 neeq12i 3053 rnsnn0 6032 onoviun 7963 onnseq 7964 intrnfi 8864 wdomtr 9023 noinfep 9107 wemapwe 9144 scott0s 9301 cplem1 9302 karden 9308 acndom2 9465 dfac5lem3 9536 fin23lem31 9754 fin23lem40 9762 isf34lem5 9789 isf34lem7 9790 isf34lem6 9791 axrrecex 10574 negne0bi 10948 rpnnen1lem4 12367 rpnnen1lem5 12368 fseqsupcl 13340 limsupgre 14830 isercolllem3 15015 rpnnen2lem12 15570 ruclem11 15585 3dvds 15672 prmreclem6 16247 0ram 16346 0ram2 16347 0ramcl 16349 gsumval2 17888 ghmrn 18363 gexex 18966 gsumval3 19020 subdrgint 19575 iinopn 21507 cnconn 22027 1stcfb 22050 qtopeu 22321 fbasrn 22489 alexsublem 22649 evth 23564 minveclem1 24028 minveclem3b 24032 ovollb2 24093 ovolunlem1a 24100 ovolunlem1 24101 ovoliunlem1 24106 ovoliun2 24110 ioombl1lem4 24165 uniioombllem1 24185 uniioombllem2 24187 uniioombllem6 24192 mbfsup 24268 mbfinf 24269 mbflimsup 24270 itg1climres 24318 itg2monolem1 24354 itg2mono 24357 itg2i1fseq2 24360 sincos4thpi 25106 axlowdimlem13 26748 eulerpath 28026 siii 28636 minvecolem1 28657 bcsiALT 28962 h1de2bi 29337 h1de2ctlem 29338 nmlnopgt0i 29780 dimval 31089 dimvalfi 31090 rge0scvg 31302 umgracycusgr 32514 cusgracyclt3v 32516 erdszelem5 32555 cvmsss2 32634 elrn3 33111 nosepnelem 33297 rankeq1o 33745 fin2so 35044 heicant 35092 scottn0f 35608 psspwb 39408 fnwe2lem2 39995 sqrtcval 40341 |
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