Suanfa Tongzong
''Suanfa tongzong'' ( zh, 算法統宗) is a mathematical text written by sixteenth century Chinese mathematician Cheng Dawei (1533–1606) and published in the year 1592. The book contains 595 problems divided into 17 chapters. The book is essentially general arithmetic for the abacus. The book was the main source available to scholars concerning mathematics as it developed in China's tradition. Six years after the publication of Suanfa Tongzong, Cheng Dawei published another book titled ''Suanfa Zuanyao'' (''A Compendium of calculating Methods''). About 90% of the content of the new book came from the contents of four chapters of the first book with some rearrangement. It is said that when Suanfa Tongzong was first published, it sold so many copies that the cost of paper went up and the lucrative sales resulted in unscrupulous people beginning to print pirated copies of the book with many errors. It was this that forced the author to print an abridged version. Some features ''Su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Bing] [Yahoo] [DuckDuckGo] [Baidu] 

Cheng Dawei
Cheng may refer to: Chinese states * Chengjia or Cheng (25–36 AD) * Cheng Han or Cheng (304–338) * Zheng (state), or Cheng in Wade–Giles Places * Chengdu, abbreviated as Cheng * Cheng County, in Gansu, China * Cheng Township, in Malacca, Malaysia People * Cheng (surname), Chinese surname * Zheng (surname), Cheng in Wade–Giles and Cantonese * ChEng, abbreviation for chief engineer A chief engineer, commonly referred to as "ChEng" or "Chief", is the most senior engine officer of an engine department on a ship, typically a merchant ship, and holds overall leadership and the responsibility of that department..Chief enginee ... Other uses * Cheng language, a Mon–Khmer language of southern Laos * Cheng (musical instrument), an ancient Chinese musical instrument See also * Zheng (other), or Cheng in Wade–Giles {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Bing] [Yahoo] [DuckDuckGo] [Baidu] 

Catherine Jami
Katherine, also spelled Catherine, and other variations are feminine names. They are popular in Christian countries because of their derivation from the name of one of the first Christian saints, Catherine of Alexandria. In the early Christian era it came to be associated with the Greek adjective (), meaning "pure", leading to the alternative spellings ''Katharine'' and ''Katherine''. The former spelling, with a middle ''a'', was more common in the past and is currently more popular in the United States than in Britain. ''Katherine'', with a middle ''e'', was first recorded in England in 1196 after being brought back from the Crusades. Popularity and variations English In Britain and the U.S., ''Catherine'' and its variants have been among the 100 most popular names since 1880. The most common variants are ''Katherine,'' ''Kathryn,'' and ''Katharine''. The spelling ''Catherine'' is common in both English and French. Lesscommon variants in English include ''Katheryn'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Bing] [Yahoo] [DuckDuckGo] [Baidu] 

Chinese Zhusuan
Zhusuan (; literally: "bead calculation") is the knowledge and practices of arithmetic calculation through the suanpan or Chinese abacus. In the year 2013, it has been inscribed on the UNESCO Representative List of the Intangible Cultural Heritage of Humanity. While deciding on the inscription, the Intergovernmental Committee noted that "Zhusuan is considered by Chinese people as a cultural symbol of their identity as well as a practical tool; transmitted from generation to generation, it is a calculating technique adapted to multiple aspects of daily life, serving multiform sociocultural functions and offering the world an alternative knowledge system." The movement to get Chinese Zhusuan inscribed in the list was spearheaded by Chinese Abacus and Mental Arithmetic Association. History Zhusuan was a abacus invented in China at the end of the 2nd century CE and reached its peak during the period from the 13th to the 16th century CE. In the 13th century, Guo Shoujing (郭守敬) u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Bing] [Yahoo] [DuckDuckGo] [Baidu] 

Mathematical Recreation
Recreational mathematics is mathematics carried out for recreation (entertainment) rather than as a strictly research and applicationbased professional activity or as a part of a student's formal education. Although it is not necessarily limited to being an endeavor for amateurs, many topics in this field require no knowledge of advanced mathematics. Recreational mathematics involves mathematical puzzles and games, often appealing to children and untrained adults, inspiring their further study of the subject. The Mathematical Association of America (MAA) includes recreational mathematics as one of its seventeen Special Interest Groups, commenting: Mathematical competitions (such as those sponsored by mathematical associations) are also categorized under recreational mathematics. Topics Some of the more wellknown topics in recreational mathematics are Rubik's Cubes, magic squares, fractals, logic puzzles and mathematical chess problems, but this area of mathematics inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Bing] [Yahoo] [DuckDuckGo] [Baidu] 

Magic Circle (mathematics)
Magic circles were invented by the Song dynasty (960–1279) Chinese mathematician Yang Hui (c. 1238–1298). It is the arrangement of natural numbers on circles where the sum of the numbers on each circle and the sum of numbers on diameters are identical. One of his magic circles was constructed from the natural numbers from 1 to 33 arranged on four concentric circles, with 9 at the center. Yang Hui magic circles Yang Hui's magic circle series was published in his ''Xugu Zhaiqi Suanfa''《續古摘奇算法》(Sequel to Excerpts of Mathematical Wonders) of 1275. His magic circle series includes: magic 5 circles in square, 6 circles in ring, magic eight circle in square magic concentric circles, magic 9 circles in square. Yang Hui magic concentric circle Yang Hui's magic concentric circle has the following properties *The sum of the numbers on four diameters = 147, ** 28 + 5 + 11 + 25 + 9 + 7 + 19& ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Bing] [Yahoo] [DuckDuckGo] [Baidu] 