sum of sets
11Direct sum — The symbol denotes direct sum; it is also the astrological and astronomical symbol for Earth, and a symbol for the Exclusive disjunction. In mathematics, one can often define a direct sum of objects already known, giving a new one. This is… …
12Dim Sum Dollies — at Pink Dot SG 2011 The Dim Sum Dollies are a musical cabaret group in Singapore, played by Selena Tan, Emma Yong and Pamela Oei. The Dollies are known for their loud and colourful costumes, spectacular dance scenes and their comical but incisive …
13Gauss sum — In mathematics, a Gauss sum or Gaussian sum is a particular kind of finite sum of roots of unity, typically: G ( chi;, psi;) = Sigma; chi;( r ) psi;( r )where the sum is over elements r of some finite commutative ring R , psi;( r ) is a group… …
14Circuits over sets of natural numbers — Circuits over natural numbers is a mathematical model used in studying computational complexity theory. It is a special case of circuit, the object is a labeled directed acyclic graph the nodes of which evaluate to sets of natural numbers, the… …
15direct sum — Math. a composition of two disjoint sets, as vector spaces, such that every element in the composition can be written uniquely as the sum of two elements, one from each of the given sets. [1925 30] * * * …
16logical sum — The logical sum of two propositions p, q is their disjunction, p ∨q . The logical sum of two sets is their union …
17Minkowski addition — The red figure is the Minkowski sum of blue and green figures. In geometry, the Minkowski sum (also known as dilation) of two sets A and B in Euclidean space is the result of adding every element of …
18Erdős conjecture — The prolific mathematician Paul Erdős and his various collaborators made many famous mathematical conjectures, over a wide field of subjects.Some of these are the following: * The Cameron–Erdős conjecture on sum free sets of integers, solved by… …
19Regular Hadamard matrix — In mathematics a regular Hadamard matrix is a Hadamard matrix whose row and column sums are all equal. While the order of a Hadamard matrix must be 1, 2, or a multiple of 4, regular Hadamard matrices carry the further restriction that the order… …
20Ben J. Green — Infobox Scientist box width = name = Ben J. Green image width = caption = birth date = birth date and age|1977|02|27 birth place = Bristol, England death date = death place = residence = Cambridge, England citizenship = nationality = British… …
