代數 域
域，或曰體者，有四則之代數結構也。
定義
- 集去零，合乘法，交換群也。
甲減乙者，甲加負乙也；甲除乙者，甲乘乙逆也，然乙必非零耳。
例
註
This article uses material from the Wikipedia 古文 / 文言文 article 域 (代數), which is released under the Creative Commons Attribution-ShareAlike 3.0 license ("CC BY-SA 3.0"); additional terms may apply (view authors). 若無側注，諸文皆奉CC BY-SA 4.0以行。 Images, videos and audio are available under their respective licenses.
®Wikipedia is a registered trademark of the Wiki Foundation, Inc. Wiki 古文 / 文言文 (DUHOCTRUNGQUOC.VN) is an independent company and has no affiliation with Wiki Foundation.