Look up sum in Wiktionary, the free dictionary. Sum most commonly means the total of two or more numbers added together; see addition. Sum can also refer...

Sylvia Lai Sui-Pun (born 23 June 1951), also known by her stage name Sum Sum, is a semi retired Hong Kong singer and actress. Lai was born in Hong Kong...

Sumer (/ˈsuːmər/) is the earliest known civilization, located in the historical region of southern Mesopotamia (now south-central Iraq), emerging during...

Sum 41 is a Canadian rock band from Ajax, Ontario. The band was formed in 1996 and currently consists of Deryck Whibley (lead vocals, guitars, keyboards)...

Dim sum (traditional Chinese: 點心; simplified Chinese: 点心; pinyin: diǎn xīn; Jyutping: dim2 sam1) is a large range of small Chinese dishes that are traditionally...

Zero-sum game is a mathematical representation in game theory and economic theory of a situation that involves two competing entities, where the result...

In mathematics, a Riemann sum is a certain kind of approximation of an integral by a finite sum. It is named after nineteenth century German mathematician...

The direct sum is an operation between structures in abstract algebra, a branch of mathematics. It is defined differently, but analogously, for different...

empty sum, or nullary sum, is a summation where the number of terms is zero. The natural way to extend non-empty sums is to let the empty sum be the...

sum _{i}x_{i}&&=\sum _{i}\tan \theta _{i}\\[6pt]e_{2}&=\sum _{i<j}x_{i}x_{j}&&=\sum _{i<j}\tan \theta _{i}\tan \theta _{j}\\[6pt]e_{3}&=\sum...