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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 2961 | . 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 1540 ≠ wne 2925 |
| 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 2926 |
| This theorem is referenced by: necon1abid 2963 necon3bid 2969 eldifsn 4737 php 9121 xmullem2 13167 fzdif1 13508 seqcoll2 14372 cnpart 15147 rlimrecl 15487 ncoprmgcdne1b 16561 prmrp 16623 4sqlem17 16873 mrieqvd 17544 mrieqv2d 17545 pltval 18236 latnlemlt 18378 latnle 18379 odnncl 19424 gexnnod 19467 sylow1lem1 19477 slwpss 19491 lssnle 19553 nzrunit 20409 imadrhmcl 20682 lspsnne1 21024 cnsubrg 21334 psrridm 21870 mhpmulcl 22034 cmpfi 23293 hausdiag 23530 txhaus 23532 isusp 24147 recld2 24701 metdseq0 24741 i1f1lem 25588 aaliou2b 26247 dvloglem 26555 logf1o2 26557 lgsne0 27244 lgsqr 27260 2sqlem7 27333 ostth3 27547 tglngne 28495 tgelrnln 28575 eucrct2eupth 30189 norm1exi 31194 atnemeq0 32321 opeldifid 32543 arginv 32691 sgnneg 32778 unitnz 33179 isdrng4 33234 pridln1 33380 mxidln1 33403 ssmxidllem 33410 rprmnz 33457 ply1unit 33510 ply1dg3rt0irred 33518 constrrtll 33698 qtophaus 33803 ordtconnlem1 33891 elzrhunit 33944 subfacp1lem6 35162 maxidln1 38028 smprngopr 38036 lsatnem0 39028 atncmp 39295 atncvrN 39298 cdlema2N 39775 lhpmatb 40014 lhpat3 40029 cdleme3 40220 cdleme7 40232 cdlemg27b 40679 dvh2dimatN 41423 dvh2dim 41428 dochexmidlem1 41443 dochfln0 41460 dvrelog2b 42043 aks6d1c2p2 42096 hashscontpow 42099 rspcsbnea 42108 nna4b4nsq 42637 |
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