| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > neeq1d | GIF version | ||
| Description: Deduction for inequality. (Contributed by NM, 25-Oct-1999.) |
| Ref | Expression |
|---|---|
| neeq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| neeq1d | ⊢ (𝜑 → (𝐴 ≠ 𝐶 ↔ 𝐵 ≠ 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | neeq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | neeq1 2433 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 ≠ 𝐶 ↔ 𝐵 ≠ 𝐶)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐴 ≠ 𝐶 ↔ 𝐵 ≠ 𝐶)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 = wceq 1402 ≠ wne 2420 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-5 1500 ax-gen 1502 ax-4 1563 ax-17 1579 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 df-ne 2421 |
| This theorem is used by: neeq12d 2440 eqnetrd 2444 prnzg 3838 suppval1 6479 elsuppfng 6482 elsuppfn 6483 suppsnopdc 6490 ressuppss 6494 pw2f1odclem 7134 hashprg 11264 algcvg 12844 algcvga 12847 eucalgcvga 12854 rpdvds 12895 phibndlem 13016 dfphi2 13020 pcaddlem 13140 ennnfoneleminc 13353 ennnfonelemex 13356 ennnfonelemhom 13357 ennnfonelemnn0 13364 ennnfonelemr 13365 ennnfonelemim 13366 ctinfomlemom 13369 setscomd 13444 rrgsupp 14625 pellexlem3 16153 lgsne0 16279 umgr2cwwkdifex 16788 dceqnconst 17232 dcapnconst 17233 nconstwlpolem 17237 |
| Copyright terms: Public domain | W3C validator |