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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 225 | . . 3 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ 𝜓)) |
3 | 2 | necon3abid 3052 | . 2 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ↔ ¬ 𝜓)) |
4 | 3 | bicomd 225 | 1 ⊢ (𝜑 → (¬ 𝜓 ↔ 𝐴 ≠ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 = wceq 1537 ≠ wne 3016 |
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 209 df-ne 3017 |
This theorem is referenced by: necon1abid 3054 necon3bid 3060 eldifsn 4719 php 8701 xmullem2 12659 seqcoll2 13824 cnpart 14599 rlimrecl 14937 ncoprmgcdne1b 15994 prmrp 16056 4sqlem17 16297 mrieqvd 16909 mrieqv2d 16910 pltval 17570 latnlemlt 17694 latnle 17695 odnncl 18673 gexnnod 18713 sylow1lem1 18723 slwpss 18737 lssnle 18800 lspsnne1 19889 nzrunit 20040 psrridm 20184 cnsubrg 20605 cmpfi 22016 hausdiag 22253 txhaus 22255 isusp 22870 recld2 23422 metdseq0 23462 i1f1lem 24290 aaliou2b 24930 dvloglem 25231 logf1o2 25233 lgsne0 25911 lgsqr 25927 2sqlem7 26000 ostth3 26214 tglngne 26336 tgelrnln 26416 eucrct2eupth 28024 norm1exi 29027 atnemeq0 30154 opeldifid 30349 pridln1 30959 mxidln1 30975 ssmxidllem 30978 qtophaus 31100 ordtconnlem1 31167 elzrhunit 31220 sgnneg 31798 subfacp1lem6 32432 maxidln1 35337 smprngopr 35345 lsatnem0 36196 atncmp 36463 atncvrN 36466 cdlema2N 36943 lhpmatb 37182 lhpat3 37197 cdleme3 37388 cdleme7 37400 cdlemg27b 37847 dvh2dimatN 38591 dvh2dim 38596 dochexmidlem1 38611 dochfln0 38628 |
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