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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 223 | . . 3 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ 𝜓)) |
| 3 | 2 | necon3abid 2969 | . 2 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ↔ ¬ 𝜓)) |
| 4 | 3 | bicomd 223 | 1 ⊢ (𝜑 → (¬ 𝜓 ↔ 𝐴 ≠ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 = wceq 1542 ≠ wne 2933 |
| 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 207 df-ne 2934 |
| This theorem is referenced by: necon1abid 2971 necon3bid 2977 eldifsn 4732 php 9141 xmullem2 13217 fzdif1 13559 seqcoll2 14427 cnpart 15202 rlimrecl 15542 ncoprmgcdne1b 16619 prmrp 16682 4sqlem17 16932 mrieqvd 17604 mrieqv2d 17605 pltval 18296 latnlemlt 18438 latnle 18439 odnncl 19520 gexnnod 19563 sylow1lem1 19573 slwpss 19587 lssnle 19649 nzrunit 20501 imadrhmcl 20774 lspsnne1 21115 cnsubrg 21407 psrridm 21941 mhpmulcl 22115 cmpfi 23373 hausdiag 23610 txhaus 23612 isusp 24226 recld2 24780 metdseq0 24820 i1f1lem 25656 aaliou2b 26307 dvloglem 26612 logf1o2 26614 lgsne0 27298 lgsqr 27314 2sqlem7 27387 ostth3 27601 tglngne 28618 tgelrnln 28698 eucrct2eupth 30315 norm1exi 31321 atnemeq0 32448 opeldifid 32669 arginv 32820 sgnneg 32906 unitnz 33300 isdrng4 33356 pridln1 33503 mxidln1 33526 ssmxidllem 33533 rprmnz 33580 ply1unit 33635 ply1dg3rt0irred 33644 constrrtll 33875 qtophaus 33980 ordtconnlem1 34068 elzrhunit 34121 subfacp1lem6 35367 maxidln1 38365 smprngopr 38373 lsatnem0 39491 atncmp 39758 atncvrN 39761 cdlema2N 40238 lhpmatb 40477 lhpat3 40492 cdleme3 40683 cdleme7 40695 cdlemg27b 41142 dvh2dimatN 41886 dvh2dim 41891 dochexmidlem1 41906 dochfln0 41923 dvrelog2b 42505 aks6d1c2p2 42558 hashscontpow 42561 rspcsbnea 42570 nna4b4nsq 43093 |
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