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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 3002 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐶 = 𝐷) |
| 3 | df-ne 2957 | . 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 2956 |
| 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 2957 |
| This theorem is used by: necom 3009 neeq1i 3020 neeq2i 3021 neeq12i 3022 rnsnn0 6202 onoviun 8335 onnseq 8336 intrnfi 9392 wdomtr 9553 noinfep 9645 wemapwe 9682 scott0bs 9925 scott0bsOLD 9926 cplem1 9931 cplem1OLD 9932 karden 9940 kardenOLD 9941 acndom2 10114 dfac5lem3 10185 fin23lem31 10402 fin23lem40 10410 isf34lem5 10437 isf34lem7 10438 isf34lem6 10439 axrrecex 11229 negne0bi 11612 rpnnen1lem4 13089 rpnnen1lem5 13090 fseqsupcl 14100 limsupgre 15628 isercolllem3 15814 rpnnen2lem12 16373 ruclem11 16388 3dvds 16481 prmreclem6 17079 0ram 17178 0ram2 17179 0ramcl 17181 gsumval2 18855 ghmrn 19423 gexex 20047 gsumval3 20101 subdrgint 21040 iinopn 23200 cnconn 23720 1stcfb 23743 qtopeu 24015 fbasrn 24183 alexsublem 24343 evth 25260 minveclem1 25725 minveclem3b 25729 ovollb2 25790 ovolunlem1a 25797 ovolunlem1 25798 ovoliunlem1 25803 ovoliun2 25807 ioombl1lem4 25862 uniioombllem1 25882 uniioombllem2 25884 uniioombllem6 25889 mbfsup 25965 mbfinf 25966 mbflimsup 25967 itg1climres 26015 itg2monolem1 26051 itg2mono 26054 itg2i1fseq2 26057 sincos4thpi 26824 nosepnelem 28018 axlowdimlem13 29514 eulerpath 30824 siii 31437 minvecolem1 31458 bcsiALT 31763 h1de2bi 32138 h1de2ctlem 32139 nmlnopgt0i 32581 wrdpmtrlast 33636 dimval 34215 dimvalfi 34216 rge0scvg 34563 rankscott 35730 kardeq0 35797 umgracycusgr 35888 cusgracyclt3v 35890 erdszelem5 35929 cvmsss2 36008 elrn3 36496 rankeq1o 36902 ttc0elw 37285 ttc0el 37293 regsfromunir1 37298 fin2so 38498 heicant 38541 scottn0f 39070 psspwb 43250 fnwe2lem2 44011 sqrtcval 44600 |
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