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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 4743 php 9135 xmullem2 13184 fzdif1 13525 seqcoll2 14392 cnpart 15167 rlimrecl 15507 ncoprmgcdne1b 16581 prmrp 16643 4sqlem17 16893 mrieqvd 17565 mrieqv2d 17566 pltval 18257 latnlemlt 18399 latnle 18400 odnncl 19478 gexnnod 19521 sylow1lem1 19531 slwpss 19545 lssnle 19607 nzrunit 20461 imadrhmcl 20734 lspsnne1 21076 cnsubrg 21386 psrridm 21922 mhpmulcl 22096 cmpfi 23356 hausdiag 23593 txhaus 23595 isusp 24209 recld2 24763 metdseq0 24803 i1f1lem 25650 aaliou2b 26309 dvloglem 26617 logf1o2 26619 lgsne0 27306 lgsqr 27322 2sqlem7 27395 ostth3 27609 tglngne 28605 tgelrnln 28685 eucrct2eupth 30303 norm1exi 31308 atnemeq0 32435 opeldifid 32656 arginv 32808 sgnneg 32895 unitnz 33302 isdrng4 33358 pridln1 33505 mxidln1 33528 ssmxidllem 33535 rprmnz 33582 ply1unit 33637 ply1dg3rt0irred 33646 constrrtll 33869 qtophaus 33974 ordtconnlem1 34062 elzrhunit 34115 subfacp1lem6 35360 maxidln1 38216 smprngopr 38224 lsatnem0 39342 atncmp 39609 atncvrN 39612 cdlema2N 40089 lhpmatb 40328 lhpat3 40343 cdleme3 40534 cdleme7 40546 cdlemg27b 40993 dvh2dimatN 41737 dvh2dim 41742 dochexmidlem1 41757 dochfln0 41774 dvrelog2b 42357 aks6d1c2p2 42410 hashscontpow 42413 rspcsbnea 42422 nna4b4nsq 42939 |
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