| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > eldifn | GIF version | ||
| Description: Implication of membership in a class difference. (Contributed by NM, 3-May-1994.) |
| Ref | Expression |
|---|---|
| eldifn | ⊢ (𝐴 ∈ (𝐵 ∖ 𝐶) → ¬ 𝐴 ∈ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eldif 3208 | . 2 ⊢ (𝐴 ∈ (𝐵 ∖ 𝐶) ↔ (𝐴 ∈ 𝐵 ∧ ¬ 𝐴 ∈ 𝐶)) | |
| 2 | 1 | simprbi 275 | 1 ⊢ (𝐴 ∈ (𝐵 ∖ 𝐶) → ¬ 𝐴 ∈ 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∈ wcel 2201 ∖ cdif 3196 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2212 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-v 2803 df-dif 3201 |
| This theorem is referenced by: elndif 3330 unssin 3445 inssun 3446 noel 3497 disjel 3548 undifexmid 4285 exmidundif 4298 exmidundifim 4299 exmid1stab 4300 phpm 7057 undifdcss 7120 fsum3cvg 11962 summodclem2a 11965 fisumss 11976 isumss2 11977 binomlem 12067 fproddccvg 12156 prodmodclem2a 12160 fprodssdc 12174 fprodsplitdc 12180 ply1termlem 15495 plyaddlem1 15500 plymullem1 15501 plycoeid3 15510 dvply1 15518 |
| Copyright terms: Public domain | W3C validator |