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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 2991 | . 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 1570 ≠ wne 2955 |
| 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 2956 |
| This theorem is used by: necon1abid 2993 necon3bid 2999 eldifsn 4747 php 9200 xmullem2 13365 fzdif1 13708 seqcoll2 14578 sgnneg 15221 cnpart 15375 rlimrecl 15715 ncoprmgcdne1b 16788 prmrp 16851 4sqlem17 17101 mrieqvd 17774 mrieqv2d 17775 pltval 18466 latnlemlt 18608 latnle 18609 degenmgm2nfun 19101 odnncl 19721 gexnnod 19764 sylow1lem1 19774 slwpss 19788 lssnle 19850 nzrunit 20737 isdrng4 20954 imadrhmcl 21016 lspsnne1 21357 pridln1 21586 cnsubrg 21695 psrridm 22232 mhpmulcl 22432 cmpfi 23688 hausdiag 23926 txhaus 23928 isusp 24542 recld2 25096 metdseq0 25136 i1f1lem 25972 aaliou2b 26632 dvloglem 26940 logf1o2 26942 lgsne0 27626 lgsqr 27642 2sqlem7 27715 ostth3 27929 tglngne 28947 tgelrnln 29032 eucrct2eupth 30780 norm1exi 31786 atnemeq0 32913 opeldifid 33127 arginv 33273 unitnz 33733 mxidln1 33925 ssmxidllem 33932 rprmnz 33986 ply1unit 34041 ply1dg3rt0irred 34050 constrrtll 34297 qtophaus 34402 ordtconnlem1 34490 elzrhunit 34543 subfacp1lem6 35871 maxidln1 38898 smprngopr 38906 lsatnem0 40022 atncmp 40289 atncvrN 40292 cdlema2N 40769 lhpmatb 41008 lhpat3 41023 cdleme3 41214 cdleme7 41226 cdlemg27b 41673 dvh2dimatN 42417 dvh2dim 42422 dochexmidlem1 42437 dochfln0 42454 dvrelog2b 43036 aks6d1c2p2 43089 hashscontpow 43092 rspcsbnea 43101 nna4b4nsq 43610 |
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