Domain yù certain place within the borders: extraterritorial. Abroad. Area. Area. Areas. Territory. Stroke: 11; radicals: soil; stroke order number: 12112511534
Domain yù 【Name】 (Phonetic. From the soil, or (yù) sound. Soil, said territory. "Domain" of this as "or", and "State" synonymous. "From the mouth, from Ge to keep one. One, and the earth." is Associative. original meaning: borders, boundaries) With the original meaning 〖landwithincertainboundaries; territory〗 Domain, the state also. - "Said Wen." Press, or letters are, the country who are also state: the emperor was to defend the nobility of the domain, the capital for the state. By Paul domains. - "Han Wei Yuancheng Biography." Note: "fief that also." He is the domain Quartet. - "Book of Poetry and black bird" Drive I, the people, economy of Renshou the domain. - "Han" Another example: the domain field (within the countryside); domain (domain); extraterritorial (outside; foreign) Local, regional 〖region; area〗 A hundred dead, into the absolute domain. - "Han" Qing Cao and I both in the absolute domain, Yuli great merit in order to wealth. - "Han Ban Chao Biography" Another example: exotic; Western Range domain〗 〖 Guan Zhong also is the carry to the field. - "Han Fei Zi" Grave, the cemetery graveyard〗 〖 Ge Sheng Meng spine, Lian Man in the domain. - "Wind Ge Sheng Tang Poetry" Another example: Domain trillion (the tomb of the boundary; cemetery) Constraints limit〗 〖 Eye of politicians, the domain in one incident, the poet of the eye, is a panoramic view through past and present. - Wang Guowei, "Human Words" Another example: Domain Domain (described as narrow and shallow ignorance)
Domain <name "(phonetic. From the soil, or sound. Soil, said the territory. Domains" or the making "and the country" are synonymous. From the mouth, from Ge to keep one. One, and the earth. "For the Associative . the original meaning of borders, territory) with the original meaning of the domain, the state also. - "Said Wen." Press, or letters are, who the country, the state has the emperor to defend the nobility of the domain, the capital for the state. By Paul domains. - "Han Wei Yuancheng Biography." Note also that the fief. "He is the domain Quartet. -" Book of Poetry and black bird "Drive I, the people, economy of Renshou the domain. -" Han "and if the domain field (within the countryside); domain (domain); Overseas (outside; foreign) areas, regions a hundred dead, into the absolute domain. - "Han" Qing Cao and I both in the field yù ⒈ domain boundaries must, within a certain range where lead ~. to ~. Area ~ . Yangtze River flow ~. ⒉ <Ancient> Bangguo, within the fief of the state ~. to Paul ~.
Yu domain Radical Radical soil total strokes 11 strokes 03 Domain field; region; territory; Domain yù <Name> (1) (Phonetic. From the soil, or (yù) sound. Soil, that territory. Domains "or the making" and the country "are synonymous. From the mouth, from Ge to keep one. One, and the earth." As the knowing words. the original meaning of borders, boundaries) (2) With the original meaning [land within certain boundaries; territory] Domain, the state also. - "Said Wen." Press, or letters are, who the country, the state has the emperor to defend the nobility of the domain, the capital for the state. By Paul domains. - "Han Wei Yuancheng Biography." Note also that the fief. " He is the domain Quartet. - "Book of Poetry and black bird" Drive I, the people, economy of Renshou the domain. - "Han" (3) Another example is the domain field (within the countryside); domain (domain); extraterritorial (outside; foreign) (4) Local, regional [region; area] A hundred dead, into the absolute domain. - "Han" Qing Cao and I both in the absolute domain, Yuli great merit in order to wealth. - "Han Ban Chao Biography" (5) Another example is exotic; Western (6) Range of [domain] Guan Zhong also is the carry to the field. - "Han Fei Zi" (7) Grave, the cemetery [graveyard] Ge Sheng Meng spine, Lian Man in the domain. - "Wind Ge Sheng Tang Poetry" (8) Another example is the domain trillion (the tomb of the boundary; cemetery) (9) Limits [limit] Eye of politicians, the domain in one incident, the poet of the eye, is a panoramic view through past and present. - Wang Guowei, "Human Words" (10) Another example is the domain field (described as narrow and shallow ignorance) Domain yù ╝ ㄩ In a certain place within the borders of ~ outside. Iso ~. District ~. To ~. Link ~. Xinjiang ~. Zheng code bhja, u57df, gbkd3f2 11 number of strokes, radical land, stroke number 12112511534
〔〕 㽣 䧕 ???? Ancient Tang Yun】 【Rain】 【pressing 【Ji Yun Yun Yun will】 【】 are more pressing, ???? sound oak. State also. Areas also, community Board also. Ancient graves】 【return air only home field. The Book of Poetry】 【He Shiu universal domain. Zhou Tai Situ 【】 local officials to land the world map, known Kyushu region, the number of wide wheels. And buildings or said domain. General articles】 【Zhuangzi Qiu water almost endless if the Quartet, nothing will disappear. Chu Zhen training】 【Huainanzi D's World, Gan Xian Evening in the clo_set_ of the domain. And never said a foreign domain. 【Before】 Chao Han Ji-gun police Limin, there can be relative, so that those who must field. Tomb said they limit the domain. People Zhou Chun 【】 charge of official graves cemetery, the Bianqi trillion domain. And six B】 【Ji Yun cut, audio Yu. Hsieh Fu 【】 snow snow house with built in East country, snow peak in the Western Regions. Under the leaves of bamboo. Do not make ????, see】 【Pei Wei. ???? and ???? different. ???? Music Die, from Ge through the mouth from the ????. This from or from the soil. ???? with ????. ???? dié, with ????.
設F是一個有單位元1（≠0）的交換環。如果F中每個非零元都可逆，稱F是一個域。 比如有理數域， 剩餘類域， 典型域， 有理函數域， 半純函數域等等。
有理數域Q和實數域R是最典型的域，因為任何非零元x∈Q（或R），都存在逆元1/x。
但整數集Z不是域，因為1/x不是整數。（整數集Z是一個環，更準確的說是整環）
Definition:
A field is a set F equipped with two binary operations, addition + and multiolication · (as usual, we often omit the · and write x·y as xy) .
真核