File:Empty set.svg
呢個「SVG」檔案嘅呢個「PNG」預覽嘅大細：400 × 400 像素。 第啲解像度：240 × 240 像素｜480 × 480 像素｜768 × 768 像素｜1,024 × 1,024 像素｜2,048 × 2,048 像素。
原本檔案 （SVG檔案，表面大細： 400 × 400 像素，檔案大細：391字節）
摘要
| 描述 | Symbol of empty set |
| 日期 | |
| 來源 | 自己作品 |
| 作者 | Octahedron80 |
協議
|
The depicted text is ineligible for copyright and therefore in the public domain because it is not a “literary work” or other protected type in sense of the local copyright law. Facts, data, and unoriginal information which is common property without sufficiently creative authorship in a general typeface or basic handwriting, and simple geometric shapes are not protected by copyright.
This tag does not generally apply to all images of texts. Particular countries can have different legal definition of the “literary work” as the subject of copyright and different courts' interpretation practices. Some countries protect almost every written work, while other countries protect distinctively artistic or scientific texts and databases only. Extent of creativeness, function and length of the text can be relevant. The copyright protection can be limited to the literary form – the included information itself can be excluded from protection.
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檔案歷史
撳個日期／時間去睇響嗰個時間出現過嘅檔案。
| 日期／時間 | 縮圖 | 尺寸 | 用戶 | 註解 | |
|---|---|---|---|---|---|
| 現時 | 2022年2月12號 (六) 00:17 | | 400 × 400（391字節） | 忍者猫 | Reduce file size |
| 2008年2月10號 (日) 09:04 |  | 400 × 400（3 KB） | Octahedron80 | {{Information |Description=Symbol of empty set |Source=self-made |Date=February 10, 2008 |Author= Octahedron80 |Permission= |other_versions= }} |
檔案用途
無嘢連來呢份檔案。
全域檔案使用情況
下面嘅維基都用緊呢個檔案：
- ca.wikipedia.org嘅使用情況
- en.wikipedia.org嘅使用情況
- es.wikipedia.org嘅使用情況
- ru.wikipedia.org嘅使用情況
- www.wikidata.org嘅使用情況
