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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 4744 php 9143 xmullem2 13192 fzdif1 13533 seqcoll2 14400 cnpart 15175 rlimrecl 15515 ncoprmgcdne1b 16589 prmrp 16651 4sqlem17 16901 mrieqvd 17573 mrieqv2d 17574 pltval 18265 latnlemlt 18407 latnle 18408 odnncl 19486 gexnnod 19529 sylow1lem1 19539 slwpss 19553 lssnle 19615 nzrunit 20469 imadrhmcl 20742 lspsnne1 21084 cnsubrg 21394 psrridm 21930 mhpmulcl 22104 cmpfi 23364 hausdiag 23601 txhaus 23603 isusp 24217 recld2 24771 metdseq0 24811 i1f1lem 25658 aaliou2b 26317 dvloglem 26625 logf1o2 26627 lgsne0 27314 lgsqr 27330 2sqlem7 27403 ostth3 27617 tglngne 28634 tgelrnln 28714 eucrct2eupth 30332 norm1exi 31337 atnemeq0 32464 opeldifid 32685 arginv 32837 sgnneg 32924 unitnz 33332 isdrng4 33388 pridln1 33535 mxidln1 33558 ssmxidllem 33565 rprmnz 33612 ply1unit 33667 ply1dg3rt0irred 33676 constrrtll 33908 qtophaus 34013 ordtconnlem1 34101 elzrhunit 34154 subfacp1lem6 35398 maxidln1 38284 smprngopr 38292 lsatnem0 39410 atncmp 39677 atncvrN 39680 cdlema2N 40157 lhpmatb 40396 lhpat3 40411 cdleme3 40602 cdleme7 40614 cdlemg27b 41061 dvh2dimatN 41805 dvh2dim 41810 dochexmidlem1 41825 dochfln0 41842 dvrelog2b 42425 aks6d1c2p2 42478 hashscontpow 42481 rspcsbnea 42490 nna4b4nsq 43007 |
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