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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 225 | . . 3 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ 𝜓)) |
| 3 | 2 | necon3abid 2987 | . 2 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ↔ ¬ 𝜓)) |
| 4 | 3 | bicomd 225 | 1 ⊢ (𝜑 → (¬ 𝜓 ↔ 𝐴 ≠ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 = wceq 1554 ≠ wne 2951 |
| 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 209 df-ne 2952 |
| This theorem is referenced by: necon1abid 2989 necon3bid 2995 eldifsn 4740 php 9164 xmullem2 13258 fzdif1 13600 seqcoll2 14468 cnpart 15243 rlimrecl 15583 ncoprmgcdne1b 16660 prmrp 16723 4sqlem17 16973 mrieqvd 17646 mrieqv2d 17647 pltval 18338 latnlemlt 18480 latnle 18481 odnncl 19561 gexnnod 19604 sylow1lem1 19614 slwpss 19628 lssnle 19690 nzrunit 20546 imadrhmcl 20819 lspsnne1 21160 cnsubrg 21452 psrridm 21987 mhpmulcl 22187 cmpfi 23441 hausdiag 23678 txhaus 23680 isusp 24294 recld2 24848 metdseq0 24888 i1f1lem 25724 aaliou2b 26375 dvloglem 26683 logf1o2 26685 lgsne0 27369 lgsqr 27385 2sqlem7 27458 ostth3 27672 tglngne 28689 tgelrnln 28769 eucrct2eupth 30386 norm1exi 31392 atnemeq0 32519 opeldifid 32741 arginv 32892 sgnneg 32978 unitnz 33373 isdrng4 33436 pridln1 33583 mxidln1 33608 ssmxidllem 33615 rprmnz 33670 ply1unit 33725 ply1dg3rt0irred 33734 constrrtll 33982 qtophaus 34087 ordtconnlem1 34175 elzrhunit 34228 subfacp1lem6 35483 maxidln1 38491 smprngopr 38499 lsatnem0 39617 atncmp 39884 atncvrN 39887 cdlema2N 40364 lhpmatb 40603 lhpat3 40618 cdleme3 40809 cdleme7 40821 cdlemg27b 41268 dvh2dimatN 42012 dvh2dim 42017 dochexmidlem1 42032 dochfln0 42049 dvrelog2b 42631 aks6d1c2p2 42684 hashscontpow 42687 rspcsbnea 42696 nna4b4nsq 43190 |
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