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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 2996 | . 2 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ↔ ¬ 𝜓)) |
| 4 | 3 | bicomd 226 | 1 ⊢ (𝜑 → (¬ 𝜓 ↔ 𝐴 ≠ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 = wceq 1563 ≠ wne 2960 |
| 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 2961 |
| This theorem is referenced by: necon1abid 2998 necon3bid 3004 eldifsn 4749 php 9179 xmullem2 13282 fzdif1 13624 seqcoll2 14492 sgnneg 15127 cnpart 15281 rlimrecl 15621 ncoprmgcdne1b 16698 prmrp 16761 4sqlem17 17011 mrieqvd 17684 mrieqv2d 17685 pltval 18376 latnlemlt 18518 latnle 18519 odnncl 19606 gexnnod 19649 sylow1lem1 19659 slwpss 19673 lssnle 19735 nzrunit 20599 imadrhmcl 20869 lspsnne1 21210 pridln1 21430 cnsubrg 21537 psrridm 22072 mhpmulcl 22272 cmpfi 23526 hausdiag 23763 txhaus 23765 isusp 24379 recld2 24933 metdseq0 24973 i1f1lem 25809 aaliou2b 26463 dvloglem 26771 logf1o2 26773 lgsne0 27457 lgsqr 27473 2sqlem7 27546 ostth3 27760 tglngne 28777 tgelrnln 28857 eucrct2eupth 30505 norm1exi 31511 atnemeq0 32638 opeldifid 32854 arginv 33004 unitnz 33471 isdrng4 33531 mxidln1 33666 ssmxidllem 33673 rprmnz 33727 ply1unit 33782 ply1dg3rt0irred 33791 constrrtll 34038 qtophaus 34143 ordtconnlem1 34231 elzrhunit 34284 subfacp1lem6 35548 maxidln1 38555 smprngopr 38563 lsatnem0 39681 atncmp 39948 atncvrN 39951 cdlema2N 40428 lhpmatb 40667 lhpat3 40682 cdleme3 40873 cdleme7 40885 cdlemg27b 41332 dvh2dimatN 42076 dvh2dim 42081 dochexmidlem1 42096 dochfln0 42113 dvrelog2b 42695 aks6d1c2p2 42748 hashscontpow 42751 rspcsbnea 42760 nna4b4nsq 43254 |
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