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| Mirrors > Home > MPE Home > Th. List > necon3bbid | Structured version Visualization version GIF version | ||
| Description: Deduction from equality to inequality. (Contributed by NM, 2-Jun-2007.) |
| Ref | Expression |
|---|---|
| necon3bbid.1 | ⊢ (𝜑 → (𝜓 ↔ 𝐴 = 𝐵)) |
| Ref | Expression |
|---|---|
| necon3bbid | ⊢ (𝜑 → (¬ 𝜓 ↔ 𝐴 ≠ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | necon3bbid.1 | . . . 4 ⊢ (𝜑 → (𝜓 ↔ 𝐴 = 𝐵)) | |
| 2 | 1 | bicomd 226 | . . 3 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ 𝜓)) |
| 3 | 2 | necon3abid 2995 | . 2 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ↔ ¬ 𝜓)) |
| 4 | 3 | bicomd 226 | 1 ⊢ (𝜑 → (¬ 𝜓 ↔ 𝐴 ≠ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ 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: necon1abid 2997 necon3bid 3003 eldifsn 4748 php 9250 xmullem2 13422 fzdif1 13766 seqcoll2 14637 sgnneg 15282 cnpart 15436 rlimrecl 15776 ncoprmgcdne1b 16854 prmrp 16917 4sqlem17 17168 mrieqvd 17841 mrieqv2d 17842 pltval 18533 latnlemlt 18675 latnle 18676 degenmgm2nfun 19168 odnncl 19789 gexnnod 19832 sylow1lem1 19842 slwpss 19856 lssnle 19918 nzrunit 20805 isdrng4 21022 imadrhmcl 21084 lspsnne1 21425 pridln1 21654 cnsubrg 21763 psrridm 22300 mhpmulcl 22500 cmpfi 23756 hausdiag 23994 txhaus 23996 isusp 24610 recld2 25164 metdseq0 25204 i1f1lem 26040 aaliou2b 26698 dvloglem 27006 logf1o2 27008 lgsne0 27692 lgsqr 27708 2sqlem7 27781 ostth3 27995 tglngne 29043 tgelrnln 29128 eucrct2eupth 30876 norm1exi 31882 atnemeq0 33009 opeldifid 33265 arginv 33409 unitnz 33869 mxidln1 34061 ssmxidllem 34068 rprmnz 34122 ply1unit 34177 ply1dg3rt0irred 34186 constrrtll 34433 qtophaus 34538 ordtconnlem1 34626 elzrhunit 34679 subfacp1lem6 36117 maxidln1 39170 smprngopr 39178 lsatnem0 40294 atncmp 40561 atncvrN 40564 cdlema2N 41041 lhpmatb 41280 lhpat3 41295 cdleme3 41486 cdleme7 41498 cdlemg27b 41945 dvh2dimatN 42689 dvh2dim 42694 dochexmidlem1 42709 dochfln0 42726 dvrelog2b 43308 aks6d1c2p2 43361 hashscontpow 43364 rspcsbnea 43373 |
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