subtraction formulas
41Object theory — For the concept of objects in philosophy, see Object (philosophy). Object theory is a theory in philosophy and mathematical logic concerning objects and the statements that can be made about objects. Contents 1 An informal theory 2 Objects 3 A… …
42logic, history of — Introduction the history of the discipline from its origins among the ancient Greeks to the present time. Origins of logic in the West Precursors of ancient logic There was a medieval tradition according to which the Greek philosopher …
43PSALMS, BOOK OF — This article is arranged according to the following outline: < <title> > place in the canon number of psalms verse division division into books composition of the psalter date of the psalter ascription to david types of psalms psalms… …
44Combinatorics — is a branch of mathematics concerning the study of finite or countable discrete structures. Aspects of combinatorics include counting the structures of a given kind and size (enumerative combinatorics), deciding when certain criteria can be met,… …
45Determinant — This article is about determinants in mathematics. For determinants in epidemiology, see Risk factor. In linear algebra, the determinant is a value associated with a square matrix. It can be computed from the entries of the matrix by a specific… …
46Vector space — This article is about linear (vector) spaces. For the structure in incidence geometry, see Linear space (geometry). Vector addition and scalar multiplication: a vector v (blue) is added to another vector w (red, upper illustration). Below, w is… …
47Surreal number — In mathematics, the surreal number system is an arithmetic continuum containing the real numbers as well as infinite and infinitesimal numbers, respectively larger or smaller in absolute value than any positive real number. The surreals share… …
48Abel–Ruffini theorem — The Abel–Ruffini theorem (also known as Abel s impossibility theorem) states that there is no general solution in radicals to polynomial equations of degree five or higher.MisinterpretationThe content of this theorem is frequently misunderstood.… …
49Alain Badiou — Infobox Philosopher region = French philosophy era = Contemporary philosophy color = #B0C4DE image size = 200px image caption = name = Alain Badiou birth = birth date and age|1937|1|17 Rabat, Morocco death = school tradition = Continental… …
50Matrix (mathematics) — Specific elements of a matrix are often denoted by a variable with two subscripts. For instance, a2,1 represents the element at the second row and first column of a matrix A. In mathematics, a matrix (plural matrices, or less commonly matrixes)… …
