adj
(mathematics) Of a polynomial expression, involving only the zeroth, second, and fourth powers of a variable, as x⁴ + 3x² + 2. Sometimes extended to any expression involving the biquadrate or fourth power (but no higher powers), as x⁴ − 4x³ + 3x² − x + 1.
n
(mathematics) Given a function f(x,y,z,...) which is concave up with respect to x (i.e., its second derivative with respect to x is greater than zero), an involutive procedure for replacing x with another variable, say p=∂f/∂x thus yielding another function, say F=F(p,y,z,...). This new function contains all of the information of the original f encoded, as it were, within it so that ∂F/∂p=x and applying a similar transformation to F yields the original f. The formula is: F(p,y,z,...)=p·x(p)-f(x(p),y,z,...) where x must be expressed as a function of p. (Note: The concave upwardness means that ∂f/∂x is monotonically increasing, which means that p as a function of x is invertible, so x should be expressible as a function of p.)
n
(mathematics) A partially ordered set with the following additional axiomatic properties: any finite subset of it has a meet, any arbitrary subset of it has a join, and distributivity, which states that a binary meet distributes with respect to an arbitrary join. (Note: locales are just like frames except that the category of locales is opposite to the category of frames.)
n
(mathematics) A function for the measurement of the "distance" between two points in some metric space: it is a real-valued function d(x,y) between points x and y satisfying the following properties: (1) "non-negativity": d(x,y)>0, (2) "identity of indiscernibles": d(x,y)=0 mbox iffx=y, (3) "symmetry": d(x,y)=d(y,x), and (4) "triangle inequality": d(x,y)
n
(mathematics) A set relatively dense X of points in the Euclidean plane or a higher-dimensional Euclidean space such that its Minkowski difference with itself is uniformly discrete. They are now best known as a mathematical model for quasicrystals.
n
An ordered subset of a poset; a generalization of a chain that allows inequalities that are not strict.
n
(mathematics) A combinatorial problem concerning the covering or inclusion of elements by a collection of shapes or sets.
n
(mathematics) A set of germs of a function that have distinct sources and a common target.
n
(graph theory, less commonly) A set V (as before), taken together with a multiset E, each of whose elements is a cardinality-two subset of V.
adj
(mathematics, of a function etc) That is linear in each variable separately.
n
(mathematics) Describing a generalization of Fibonacci numbers
n
(algebra) A root of a polynomial equation which has multiplicity greater than one.
n
(mathematics) Schur multiplier
n
(mathematics) An ordinary trigonometric function
n
given two vectors v,w, |v+w|<|v|+|w| (the triangle inequality).
n
(game theory) A matrix that represents the possible outcomes of a game
n
(mathematics) rectangular number
n
(calculus) a covector field
n
(mathematics) A half space that does not include the plane that bounds it
n
(mathematics) an interval in the real number line which does not contain its supremum and infimum. If specified by a pair of real numbers, then it consists of all the points on the real line whose values lie strictly between those two real numbers.
n
(mathematics) An orthogonal function whose inner product with itself is unity
n
(mathematics) A technique which, when applied iteratively, can solve certain types of matrix equation
n
(mathematics) An approximation to a fundamental solution of a partial differential equation, and is essentially an approximate inverse to a differential operator.
n
(mathematics) The arctangent of the quotient formed by dividing the imaginary part of a complex number by the real part.
adj
(mathematics) Describing a generalization of subharmonic functions
n
(mathematics) A Sheffer sequence.
n
(mathematics) A transformation which extracts a fragment of a mathematical object.
n
(statistics) A matrix that maps a vector of response (dependent variable) values to a vector of fitted or predicted values.
n
(mathematics) A contravariant operator formed by substituting signs of partial differentiation for the facients of a quantic.
adj
(mathematics, of a space) having a bounded image
n
(mathematics) The largest cardinality (or infinite) of a set of points (in a function class) that can be shattered.
n
(mathematics) The formula x=(-b±√)/(2a) for finding roots of the quadratic equation.
n
(mathematics) Any function whose value is the solution of a quadratic polynomial
n
(mathematics) An irrational number that is the solution of a quadratic equation of the form ax²+bx+c=0, where a, b, and c are integers and a ≠ 0.
adj
(mathematics, of a topological vector space) For which every barrelled bornivorous set in the space is a neighbourhood of zero.
n
(mathematics) Apparently zero
n
(mathematics) radial distribution function
n
(mathematics) The real number system, viewed as a line.
adj
(rare, mathematics, of a set) Being the closure of its interior.
adj
(rare, mathematics, of a set) Being the interior of its closure.
n
(mathematics) The number of possible lattice paths from the southwest corner (0, 0) of an n × n grid to the northeast corner (n, n), using only single steps north, northeast or east, and not rising above the southwest–northeast diagonal.
n
(singular only) A particular operator that, when applied to a function f yields a function x↦(f(x))/(f'(x))-3/2((f(x))/(f'(x)))²
n
(mathematical analysis) A function denoted ∥v∥ that maps a vector v to a non-negative value such that ∥cv∥ = |c|.∥v∥, where c is a scalar, and ∥v + w∥ ≤ ∥v∥ + ∥w∥ (the triangle inequality); the condition that ∥v∥ = 0 implies that v = 0 is not required, but when it holds, the semi-norm is a norm.
n
(mathematics) A class that is closed under intersection and semiclosed under set difference
n
(mathematics) A projection that has the property that for any projection onto its image, it is possible to find a corresponding projection onto its domain such that locally constant regions about a point projected onto the image have locally constant images in the domain.
adj
(mathematics) Of a Young tableau: having the entries weakly increasing along each row and strictly increasing down each column.
n
(mathematics) An algebraic equation or function of the sixth degree, e.g. a polynomial of degree 6; a curve surface etc. describing such an equation or function, especially a quantic of the sixth degree.
n
(mathematics) a covariant of degree 6
n
(mathematics) The value or range of values of a function for which a derivative does not exist.
n
(mathematics, statistics) A generalization of the logistic function that "squashes" a K-dimensional vector mathbf z of arbitrary real values to a K-dimensional vector 𝜎( mathbf z) of real values in the range (0, 1).
n
(mathematics) Any function of a real variable whose value increases as the variable increases.
adj
(mathematics) of a transfer function, where the degree of the numerator is less than that of the denominator
n
(mathematics) A continuum making up part of another continuum.
n
A subdivision of a determinant
n
(mathematics) subderivative
n
(mathematics) A partial digraph
adj
(mathematics) Describing a subalgebra of a direct product
n
A particular form of subalgebra
n
(mathematics) A formation that is a subset of a larger formation.
n
(mathematics) A subset of a fractal
n
(mathematics) subderivative
n
(mathematics) A subset of a poset
n
(mathematics) A quotient object of a subobject.
n
(mathematics) A generalization of a resultant that is the product of the pairwise differences of the roots of polynomials
n
(mathematics) A subset of a scheme
adj
(mathematics, computing) Produced or manipulated by subsetting
n
(mathematics) A subset of a sheaf
n
(mathematics) A subset of solutions in game theory
n
(mathematics) A subset of a universe.
n
(mathematics) A subset of a vector (ordered tuple, or member of a vector space)
n
(mathematics) A single entity that represents multiple irreducible characters but is treated as a single character in the algebraic theory of Carlos André.
n
(mathematics) An iterated function for complexified continuous iteration index.
n
(mathematics) The parent graph that includes a subgraph.
n
(mathematics) A superstable limit
n
(mathematics) A kind of measure on a Hilbert space.
n
(mathematics) A particular module over a superring or superalgebra
n
(mathematics) A generalization of a complex number in a commutative superalgebra
n
(mathematics) A tetration.
n
(mathematics) A form of stochastic process related to diffusion.
adj
(mathematics) Of or relating to a distribution that has derivatives of all orders.
n
(mathematics) The superset of a solution
n
(mathematics) The fifth power of a number.
n
(mathematics) A bipartite graph used to state constraints or equations which specify error-correcting codes, used to construct longer codes from smaller ones.
n
(differential geometry) Synonym of transition function.
n
(mathematics) The second of the polygamma functions, after the digamma function.
adj
(mathematics) multiperfect such that σ(n) = 3n
adj
(mathematics) Holomorphic and such that all derivatives are uniformly bounded by a constant multiple of the argument that can be associated with the order of the derivative.
adj
(of a real-valued function on a topological space) Such that, for each fixed number, the subspace of points whose images are at least that number is closed.
n
(mathematics) The upper subset of a semilattice
n
(mathematics) A directed quantity, one with both magnitude and direction; the signed difference between two points.
n
(mathematics) A finite collection of boxes, or cells, arranged in left-justified rows, with the row lengths in non-increasing order. Listing the number of boxes in each row gives a partition λ of a non-negative integer n, the total number of boxes of the diagram.
n
(mathematics) A transform that converts a discrete time-domain signal into a complex frequency-domain representation.
n
(mathematics) A mathematical function formally known as the Riemann zeta function.
n
(mathematical analysis) A collection of subsets of a given set, such that the empty set is part of this collection, the collection is closed under complements (with respect to the given set) and the collection is closed under countable unions.
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