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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 4730 php 9132 xmullem2 13206 fzdif1 13548 seqcoll2 14416 cnpart 15191 rlimrecl 15531 ncoprmgcdne1b 16608 prmrp 16671 4sqlem17 16921 mrieqvd 17593 mrieqv2d 17594 pltval 18285 latnlemlt 18427 latnle 18428 odnncl 19509 gexnnod 19552 sylow1lem1 19562 slwpss 19576 lssnle 19638 nzrunit 20490 imadrhmcl 20763 lspsnne1 21105 cnsubrg 21415 psrridm 21950 mhpmulcl 22124 cmpfi 23382 hausdiag 23619 txhaus 23621 isusp 24235 recld2 24789 metdseq0 24829 i1f1lem 25665 aaliou2b 26320 dvloglem 26628 logf1o2 26630 lgsne0 27317 lgsqr 27333 2sqlem7 27406 ostth3 27620 tglngne 28637 tgelrnln 28717 eucrct2eupth 30335 norm1exi 31341 atnemeq0 32468 opeldifid 32689 arginv 32840 sgnneg 32926 unitnz 33320 isdrng4 33376 pridln1 33523 mxidln1 33546 ssmxidllem 33553 rprmnz 33600 ply1unit 33655 ply1dg3rt0irred 33664 constrrtll 33896 qtophaus 34001 ordtconnlem1 34089 elzrhunit 34142 subfacp1lem6 35388 maxidln1 38376 smprngopr 38384 lsatnem0 39502 atncmp 39769 atncvrN 39772 cdlema2N 40249 lhpmatb 40488 lhpat3 40503 cdleme3 40694 cdleme7 40706 cdlemg27b 41153 dvh2dimatN 41897 dvh2dim 41902 dochexmidlem1 41917 dochfln0 41934 dvrelog2b 42516 aks6d1c2p2 42569 hashscontpow 42572 rspcsbnea 42581 nna4b4nsq 43104 |
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