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Mirrors > Home > MPE Home > Th. List > necon3abid | Structured version Visualization version GIF version |
Description: Deduction from equality to inequality. (Contributed by NM, 21-Mar-2007.) |
Ref | Expression |
---|---|
necon3abid.1 | ⊢ (𝜑 → (𝐴 = 𝐵 ↔ 𝜓)) |
Ref | Expression |
---|---|
necon3abid | ⊢ (𝜑 → (𝐴 ≠ 𝐵 ↔ ¬ 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ne 2782 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐴 = 𝐵) | |
2 | necon3abid.1 | . . 3 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ 𝜓)) | |
3 | 2 | notbid 307 | . 2 ⊢ (𝜑 → (¬ 𝐴 = 𝐵 ↔ ¬ 𝜓)) |
4 | 1, 3 | syl5bb 271 | 1 ⊢ (𝜑 → (𝐴 ≠ 𝐵 ↔ ¬ 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 = wceq 1475 ≠ wne 2780 |
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 196 df-ne 2782 |
This theorem is referenced by: necon3bbid 2819 necon2abid 2824 foconst 6039 fndmdif 6229 suppsnop 7196 om00el 7543 oeoa 7564 cardsdom2 8697 mulne0b 10547 crne0 10890 expneg 12730 hashsdom 13031 prprrab 13112 gcdn0gt0 15077 cncongr2 15220 pltval3 16790 mulgnegnn 17374 drngmulne0 18592 lvecvsn0 18930 domnmuln0 19119 mvrf1 19246 connsub 21034 pthaus 21251 xkohaus 21266 bndth 22565 lebnumlem1 22568 dvcobr 23515 dvcnvlem 23543 mdegle0 23641 coemulhi 23814 vieta1lem1 23869 vieta1lem2 23870 aalioulem2 23892 cosne0 24080 atandm3 24405 wilthlem2 24595 issqf 24662 mumullem2 24706 dchrptlem3 24791 lgseisenlem3 24902 brbtwn2 25585 colinearalg 25590 vdn0frgrav2 26550 vdgn0frgrav2 26551 vdn1frgrav2 26552 vdgn1frgrav2 26553 nmlno0lem 27032 nmlnop0iALT 28238 atcvat2i 28630 divnumden2 28951 bnj1542 30181 bnj1253 30339 ptrecube 32579 poimirlem13 32592 llnexchb2 34173 cdlemb3 34912 rencldnfilem 36402 qirropth 36491 binomcxplemfrat 37572 binomcxplemradcnv 37573 odz2prm2pw 40013 vdn0conngrumgrv2 41363 vdgn1frgrv2 41466 |
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