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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 2992 | . 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 1568 ≠ wne 2956 |
| 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 2957 |
| This theorem is referenced by: necon1abid 2994 necon3bid 3000 eldifsn 4752 php 9190 xmullem2 13290 fzdif1 13633 seqcoll2 14502 sgnneg 15137 cnpart 15291 rlimrecl 15631 ncoprmgcdne1b 16707 prmrp 16770 4sqlem17 17020 mrieqvd 17693 mrieqv2d 17694 pltval 18385 latnlemlt 18527 latnle 18528 odnncl 19614 gexnnod 19657 sylow1lem1 19667 slwpss 19681 lssnle 19743 nzrunit 20607 isdrng4 20824 imadrhmcl 20879 lspsnne1 21220 pridln1 21447 cnsubrg 21556 psrridm 22091 mhpmulcl 22291 cmpfi 23544 hausdiag 23781 txhaus 23783 isusp 24397 recld2 24951 metdseq0 24991 i1f1lem 25827 aaliou2b 26481 dvloglem 26789 logf1o2 26791 lgsne0 27475 lgsqr 27491 2sqlem7 27564 ostth3 27778 tglngne 28795 tgelrnln 28879 eucrct2eupth 30562 norm1exi 31568 atnemeq0 32695 opeldifid 32910 arginv 33058 unitnz 33524 mxidln1 33715 ssmxidllem 33722 rprmnz 33776 ply1unit 33831 ply1dg3rt0irred 33840 constrrtll 34087 qtophaus 34192 ordtconnlem1 34280 elzrhunit 34333 subfacp1lem6 35643 maxidln1 38661 smprngopr 38669 lsatnem0 39787 atncmp 40054 atncvrN 40057 cdlema2N 40534 lhpmatb 40773 lhpat3 40788 cdleme3 40979 cdleme7 40991 cdlemg27b 41438 dvh2dimatN 42182 dvh2dim 42187 dochexmidlem1 42202 dochfln0 42219 dvrelog2b 42801 aks6d1c2p2 42854 hashscontpow 42857 rspcsbnea 42866 nna4b4nsq 43362 |
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