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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 2993 | . 2 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ↔ ¬ 𝜓)) |
| 4 | 3 | bicomd 226 | 1 ⊢ (𝜑 → (¬ 𝜓 ↔ 𝐴 ≠ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 = wceq 1569 ≠ wne 2957 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
| This proof depends on definitions: df-bi 210 df-ne 2958 |
| This theorem is used by: necon1abid 2995 necon3bid 3001 eldifsn 4752 php 9189 xmullem2 13297 fzdif1 13640 seqcoll2 14509 sgnneg 15144 cnpart 15298 rlimrecl 15638 ncoprmgcdne1b 16714 prmrp 16777 4sqlem17 17027 mrieqvd 17700 mrieqv2d 17701 pltval 18392 latnlemlt 18534 latnle 18535 odnncl 19621 gexnnod 19664 sylow1lem1 19674 slwpss 19688 lssnle 19750 nzrunit 20633 isdrng4 20850 imadrhmcl 20911 lspsnne1 21252 pridln1 21479 cnsubrg 21588 psrridm 22123 mhpmulcl 22323 cmpfi 23576 hausdiag 23813 txhaus 23815 isusp 24429 recld2 24983 metdseq0 25023 i1f1lem 25859 aaliou2b 26515 dvloglem 26824 logf1o2 26826 lgsne0 27510 lgsqr 27526 2sqlem7 27599 ostth3 27813 tglngne 28830 tgelrnln 28914 eucrct2eupth 30607 norm1exi 31613 atnemeq0 32740 opeldifid 32955 arginv 33103 unitnz 33567 mxidln1 33758 ssmxidllem 33765 rprmnz 33819 ply1unit 33874 ply1dg3rt0irred 33883 constrrtll 34130 qtophaus 34235 ordtconnlem1 34323 elzrhunit 34376 subfacp1lem6 35685 maxidln1 38723 smprngopr 38731 lsatnem0 39847 atncmp 40114 atncvrN 40117 cdlema2N 40594 lhpmatb 40833 lhpat3 40848 cdleme3 41039 cdleme7 41051 cdlemg27b 41498 dvh2dimatN 42242 dvh2dim 42247 dochexmidlem1 42262 dochfln0 42279 dvrelog2b 42861 aks6d1c2p2 42914 hashscontpow 42917 rspcsbnea 42926 nna4b4nsq 43420 |
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