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Applying operations to functions in terms of values for each input "point"
In mathematics, the qualifier pointwise is used to indicate that a certain property is defined by considering each value f ( x ) {\displaystyle f(x)}
Pointwise
Notion of convergence in mathematics
In mathematics, pointwise convergence is one of various senses in which a sequence of functions can converge to a particular function. It is weaker than
Pointwise_convergence
Information Theory
In statistics, probability theory and information theory, pointwise mutual information (PMI), or point mutual information, is a measure of association
Pointwise_mutual_information
Theorem in measure theory
is almost everywhere pointwise convergent to a function then the sequence converges in L 1 {\displaystyle L_{1}} to its pointwise limit, and in particular
Dominated_convergence_theorem
Mode of convergence of a function sequence
uniform convergence is a mode of convergence of functions stronger than pointwise convergence. A sequence of functions ( f n ) {\displaystyle (f_{n})} converges
Uniform_convergence
Theorem stating that pointwise boundedness implies uniform boundedness
operators (and thus bounded operators) whose domain is a Banach space, pointwise boundedness is equivalent to uniform boundedness in operator norm. The
Uniform_boundedness_principle
Semantic similarity measure
In computational linguistics, second-order co-occurrence pointwise mutual information (SOC-PMI) is a method used to measure semantic similarity, or how
Second-order co-occurrence pointwise mutual information
Second-order_co-occurrence_pointwise_mutual_information
Relation among continuous functions
equicontinuous and converges pointwise to a function (not necessarily continuous a-priori). In particular, the limit of an equicontinuous pointwise convergent sequence
Equicontinuity
Class of confidence intervals around statistical functionals of a distribution
producing bounds on the CDF, we must differentiate between pointwise and simultaneous bands. A pointwise CDF bound is one which only guarantees their coverage
CDF-based nonparametric confidence interval
CDF-based_nonparametric_confidence_interval
Property of a sequence or series
define pointwise Cauchy convergence, uniform convergence, and uniform Cauchy convergence of the sequence. Pointwise convergence implies pointwise Cauchy
Modes_of_convergence
Set of functions between two fixed sets
set X into a vector space has a natural vector space structure given by pointwise addition and scalar multiplication. In other scenarios, the function space
Function_space
-topology on F {\displaystyle F} is called the topology of pointwise convergence. The topology of pointwise convergence on F {\displaystyle F} is identical to
Topologies on spaces of linear maps
Topologies_on_spaces_of_linear_maps
Curves whose limit does not preserve length
provides an analogous example showing that polyhedral surfaces that converge pointwise to a curved surface do not necessarily converge to its area, even when
Staircase_paradox
In mathematics, the lower envelope or pointwise minimum of a finite set of functions is the pointwise minimum of the functions, the function whose value
Lower_envelope
Result in probability theory
convergence in distribution of the sequence of random variables with pointwise convergence of their characteristic functions. This theorem is the basis
Lévy's_continuity_theorem
Whenever certain curvatures are pointwise constant then they must be globally constant
is a result that says, heuristically, whenever certain curvatures are pointwise constant then they are forced to be globally constant. The proof is essentially
Schur's lemma (Riemannian geometry)
Schur's_lemma_(Riemannian_geometry)
Decomposition of periodic functions
{\tfrac {n}{P}}x}\,dx.} The series does not necessarily converge (in the pointwise sense) and, even if it does, it is not necessarily equal to s ( x ) {\displaystyle
Fourier_series
Mathematical problem in classical harmonic analysis
must be met. Determination of convergence requires the comprehension of pointwise convergence, uniform convergence, absolute convergence, Lp spaces, summability
Convergence_of_Fourier_series
1966 result in mathematical analysis
fundamental result in mathematical analysis establishing the (Lebesgue) pointwise almost everywhere convergence of Fourier series of L2 functions, proved
Carleson's_theorem
Mathematical theorem in real analysis
well. This theorem does not hold if uniform convergence is replaced by pointwise convergence. For example, let ƒn : [0, 1] → R be the sequence of functions
Uniform_limit_theorem
Tools to represent statistical uncertainty
these confidence intervals constitute a 95% pointwise confidence band for f(x). In mathematical terms, a pointwise confidence band f ^ ( x ) ± w ( x ) {\displaystyle
Confidence and prediction bands
Confidence_and_prediction_bands
Use of machine learning to rank items
Rank approaches are often categorized using one of three approaches: pointwise (where individual documents are ranked), pairwise (where pairs of documents
Learning_to_rank
Lemma in measure theory
Then: the sequence { g n ( x ) } n {\displaystyle \{g_{n}(x)\}_{n}} is pointwise non-decreasing at any x and g n ≤ f n {\displaystyle g_{n}\leq f_{n}}
Fatou's_lemma
Spacetime modeled by four pointwise-orthonormal vector fields
relativity, a frame field (also called a tetrad or vierbein) is a set of four pointwise-orthonormal vector fields, one timelike and three spacelike, defined on
Frame fields in general relativity
Frame_fields_in_general_relativity
Mathematical function with no sudden changes
(see microcontinuity). The formal definition and the distinction between pointwise continuity and uniform continuity were first given by Bolzano in the 1830s
Continuous_function
Mathematical concept
on the circle, Hεf converges uniformly to Hf, so in particular pointwise. The pointwise limit is a Cauchy principal value, written H f = P . V . 1 π ∫
Singular integral operators of convolution type
Singular_integral_operators_of_convolution_type
Point to which functions converge in analysis
) = g ( y ) pointwise . {\displaystyle \lim _{x\to p}f(x,y)=g(y)\;\;{\text{pointwise}}.} Alternatively, we may say f tends to g pointwise as x approaches
Limit_of_a_function
Problem in natural language processing and information retrieval
In natural language processing and information retrieval, cluster labeling is the problem of picking descriptive, human-readable labels for the clusters
Cluster_labeling
Sufficient criterion for uniform convergence
theorem says that if a monotone sequence of continuous functions converges pointwise on a compact space and if the limit function is also continuous, then
Dini's_theorem
Vector space of infinite sequences
turned into a vector space under the operations of pointwise addition of functions and pointwise scalar multiplication. All sequence spaces are linear
Sequence_space
Theorem
sufficiently well-behaved can be represented as the distribution/law of a pointwise convergent sequence of random variables defined on a common probability
Skorokhod's representation theorem
Skorokhod's_representation_theorem
Mathematics of real numbers and real functions
mathematicians consider real and imaginary parts of complex sequences, or by pointwise evaluation of operator sequences.[clarification needed] Many of the theorems
Real_analysis
Value to which tends an infinite sequence
called pointwise limit, denoted x n , m → y m pointwise {\displaystyle x_{n,m}\to y_{m}\quad {\text{pointwise}}} , or lim n → ∞ x n , m = y m pointwise {\displaystyle
Limit_of_a_sequence
Type of Riemannian manifold with constant Jacobi operator spectrum
Riemann curvature tensor. A manifold M n {\displaystyle M^{n}} is called pointwise Osserman if, for every p ∈ M n {\displaystyle p\in M^{n}} , the spectrum
Osserman_manifold
Approximation in mathematics
narrower with decreasing ε {\displaystyle \varepsilon } , the approximations converge to the outer solution pointwise, but not uniformly, almost everywhere.
Method of matched asymptotic expansions
Method_of_matched_asymptotic_expansions
Space of bounded sequences
fulfills the conditions of being localizable and therefore semifinite). Pointwise multiplication gives them the structure of a Banach algebra, and in fact
L-infinity
Notions of probabilistic convergence, applied to estimation and asymptotic analysis
characteristic functions ( φ n ) n {\displaystyle (\varphi _{n})_{n}} converges pointwise to the characteristic function φ {\displaystyle \varphi } of X {\displaystyle
Convergence of random variables
Convergence_of_random_variables
Theorem concerning uniform convergence
Egorov's theorem establishes a condition for the uniform convergence of a pointwise convergent sequence of measurable functions. It is also named Severini–Egoroff
Egorov's_theorem
Measure of dependence between two variables
{\displaystyle X} and Y {\displaystyle Y} . MI is the expected value of the pointwise mutual information (PMI). The quantity was defined and analyzed by Claude
Mutual_information
continuous functions by transfinite iteration of the operation of forming pointwise limits of sequences of functions. They were introduced by René-Louis Baire
Baire_function
Linear map from a vector space to its field of scalars
a vector space over k with addition and scalar multiplication defined pointwise. This space is called the dual space of V, or sometimes the algebraic
Linear_form
Indicator function of positive numbers
kx\right)\end{aligned}}} These limits hold pointwise and in the sense of distributions. In general, however, pointwise convergence need not imply distributional
Heaviside_step_function
than being uniformly Cauchy. In general a sequence can be pointwise Cauchy and not pointwise convergent, or it can be uniformly Cauchy and not uniformly
Uniformly_Cauchy_sequence
functions. For a function f {\displaystyle f} defined on [0,1), the first pointwise dyadic derivative of f {\displaystyle f} at a point x {\displaystyle x}
Dyadic_derivative
Theorem in complex analysis
statement concerning holomorphic functions on the unit disk and their pointwise extension to the boundary of the disk. If we have a holomorphic function
Fatou's_theorem
Mathematical concept
Non-UI sequence of RVs. The area under the strip is always equal to 1, but X n → 0 {\displaystyle X_{n}\to 0} pointwise.
Uniform_integrability
group, then the set Ch(G) of these morphisms forms an abelian group under pointwise multiplication. This group is referred to as the character group of G
Multiplicative_character
theoretical physics, the classification of electromagnetic fields is a pointwise classification of bivectors at each point of a Lorentzian manifold. It
Classification of electromagnetic fields
Classification_of_electromagnetic_fields
Intuitively, Wijsman convergence is to convergence in the Hausdorff metric as pointwise convergence is to uniform convergence. The convergence was defined by
Wijsman_convergence
Condition in thermodynamics
{\displaystyle h_{\nu }=-\nabla \cdot \mathbf {F} _{\nu }} . They define (pointwise) monochromatic radiative equilibrium by ∇ ⋅ F ν = 0 {\displaystyle \nabla
Radiative_equilibrium
Area of mathematical analysis
Hardy–Littlewood maximal function. Maximal functions are used to control pointwise convergence, differentiation of integrals, and boundary limits of harmonic
Harmonic_analysis
Statement in complex analysis
result in complex differential geometry that estimates the (squared) pointwise norm | ∂ f | 2 {\displaystyle |\partial f|^{2}} of a holomorphic map f
Schwarz_lemma
Mathematical group of loops in a Lie group
maps from the circle S1 to a Lie group G, with multiplication defined pointwise. When G is a compact Lie group, LG is a basic example of an infinite-dimensional
Loop_group
On convergent subsequences of functions that are locally of bounded total variation
that a ≤ fn ≤ b for every n ∈ N. Then the sequence (fn)n ∈ N admits a pointwise convergent subsequence. The proof requires the basic facts about monotonic
Helly's_selection_theorem
Chess variant
bishop moves pointwise. It can also move one step edgewise. The queen moves as a rook and bishop. The king moves one step edgewise or pointwise. There is
Rhombic_chess
Algebraic ring without a multiplicative identity
possible identity element for pointwise multiplication, cannot exist in such spaces, which therefore are rngs (for pointwise addition and multiplication)
Rng_(algebra)
Integral expressing the amount of overlap of one function as it is shifted over another
(amplitude and/or phase). In other words, the output transform is the pointwise product of the input transform with a third transform (known as a transfer
Convolution
System of complete and orthogonal polynomials
In mathematics, Legendre polynomials, named after Adrien-Marie Legendre (1782), are a system of complete and orthogonal polynomials with a wide number
Legendre_polynomials
American multinational computational software company
analysis of turbulence fluid flow. Acquired by Cadence from Pointwise in 2021, Fidelity Pointwise is for computational fluid dynamics (CFD) mesh generation
Cadence_Design_Systems
Theorem in measure theory
Fatou and Henri Léon Lebesgue. If the sequence of functions converges pointwise, the inequalities turn into equalities and the theorem reduces to Lebesgue's
Fatou–Lebesgue_theorem
Elementwise product of two matrices
network models, specifically convolutional layers. Frobenius inner product Pointwise product Kronecker product Khatri–Rao product Horn, Roger A.; Johnson,
Hadamard_product_(matrices)
On when a family of real, continuous functions has a uniformly convergent subsequence
compact-open topology if and only if it is equicontinuous and pointwise relatively compact. Here pointwise relatively compact means that for each x ∈ X, the set
Arzelà–Ascoli_theorem
Machine learning technique
assumption that assumes that pairwise preferences can be substituted with pointwise rewards. Kahneman-Tversky optimization (KTO) is another direct alignment
Reinforcement learning from human feedback
Reinforcement_learning_from_human_feedback
Type of signal in signal processing
While the expectation being zero is not inherently problematic, if the pointwise variance is finite, the variance of this integral would be zero, meaning
White_noise
left (respectively right) R-module homomorphisms from M to R with the pointwise right (respectively left) module structure. The dual module is typically
Dual_module
Theorem on the convergence of harmonic functions
. on an open connected subset G of the Euclidean space Rn, which are pointwise monotonically nondecreasing in the sense that u 1 ( x ) ≤ u 2 ( x ) ≤
Harnack's_principle
group representations from G to a topological group H is the topology of pointwise convergence, i.e. pi converges to p if the limit of pi(g) = p(g) for every
Algebraic_topology_(object)
Way to write a number as a product of other numbers
partitions of finite sequences of positive integers, with the addition made pointwise. Although the study of multiplicative partitions has been ongoing since
Multiplicative_partition
Algebraic structure
are endomorphisms of a medial magma, then the mapping f • g defined by pointwise multiplication (f • g)(x) = f(x) • g(x) is itself an endomorphism. It
Medial_magma
Statement of spherically symmetric spacetimes
George David Birkhoff (author of another famous Birkhoff theorem, the pointwise ergodic theorem which lies at the foundation of ergodic theory). Israel's
Birkhoff's theorem (relativity)
Birkhoff's_theorem_(relativity)
Theorems on the convergence of bounded monotonic sequences
Lebesgue and Beppo Levi that says that for sequences of non-negative pointwise-increasing measurable functions 0 ≤ f 1 ( x ) ≤ f 2 ( x ) ≤ ⋯ {\displaystyle
Monotone_convergence_theorem
Mathematical term
sometimes called the simple convergence or the pointwise convergence. Indeed, it coincides with the pointwise convergence of linear functionals. If X is a
Weak_topology
features that differentiate BMDs from BDDs are using linear instead of pointwise diagrams, and having weighted edges. The rules that ensure the canonicity
Binary_moment_diagram
Machine learning framework
operators act pointwise on functions and are typically parametrized as multilayer perceptrons. σ {\displaystyle \sigma } is a pointwise nonlinearity,
Neural_operators
German mathematician (1815–1897)
Cours d'analyse, Cauchy argued that the (pointwise) limit of (pointwise) continuous functions was itself (pointwise) continuous, a statement that is false
Karl_Weierstrass
Fuzzy logic concept
ordering of t-norms is pointwise, that is, T1 ≤ T2 if T1(a, b) ≤ T2(a, b) for all a, b in [0, 1]. As functions, pointwise larger t-norms are sometimes
T-norm
Branch of mathematics that studies dynamical systems
distribution of probabilities on the unit interval. More precisely, the pointwise or strong ergodic theorem states that the limit in the definition of the
Ergodic_theory
Duality for locally compact abelian groups
homomorphisms from the group to the circle group, with the operation of pointwise multiplication and the topology of uniform convergence on compact sets
Pontryagin_duality
Region of the observable universe
justification of this view is that no subluminal Hubble volume will exist and pointwise superluminal expansion (the generalization of the Big Bang theory) will
Hubble_volume
In mathematics, vector space of linear forms
on V , {\displaystyle V,} together with the vector space structure of pointwise addition and scalar multiplication by constants. The dual space as defined
Dual_space
Topology on Cartesian products of topological spaces
are cylinder sets. The product topology is also called the topology of pointwise convergence because a sequence (or more generally, a net) in ∏ i ∈ I X
Product_topology
African-American mathematician
his research contributions include pointwise convergence of averages along cubes, being “the first complete pointwise convergence result obtained in the
Idris_Assani
Function with a repeating pattern
instance, for L2 functions, Carleson's theorem states that they have a pointwise (Lebesgue) almost everywhere convergent Fourier series. Weisstein, Eric
Periodic_function
Generalization of vector spaces from fields to rings
f : S → M, then with addition and scalar multiplication in MS defined pointwise by (f + g)(s) = f(s) + g(s) and (rf)(s) = rf(s), MS is a left R-module
Module_(mathematics)
Technique in topological data analysis
finite-dimensional vector spaces. The latter condition is sometimes referred to as pointwise finite-dimensional. Let I {\displaystyle I} be an interval in R {\displaystyle
Persistence_barcode
Undecidability of equality of real numbers
(representing the pointwise addition of the functions that A and B represent) A − B (representing pointwise subtraction) AB (representing pointwise multiplication)
Richardson's_theorem
Theorem in functional analysis
\left(X^{\prime },X\right).} The weak-* topology is also called the topology of pointwise convergence because given a map f {\displaystyle f} and a net of maps
Banach–Alaoglu_theorem
Function in discrete mathematics
has been shown that any linear transform that turns convolution into pointwise product is the DFT up to a permutation of coefficients. Since the number
Discrete_Fourier_transform
Property that is not changed by mathematical transformations
power set of U. (Some authors use the terminology setwise invariant, vs. pointwise invariant, to distinguish between these cases.) For example, a circle
Invariant_(mathematics)
Result in measure theory
Scheffe's theorem, in the form stated here, implies that almost everywhere pointwise convergence of the probability density functions of a sequence of μ {\displaystyle
Scheffé's_lemma
Finite or infinite ordered list of elements
turned into a vector space under the operations of pointwise addition of functions and pointwise scalar multiplication. All sequence spaces are linear
Sequence
Average value of a random variable
[X_{n}]\to \operatorname {E} [X]} even if X n → X {\displaystyle X_{n}\to X} pointwise. Thus, one cannot interchange limits and expectation, without additional
Expected_value
Type of mathematical space
numbers x. The coarsest such topology, sometimes called the topology of pointwise convergence, is the product topology. With this topology, K is a compact
Compact_space
Mathematical theory
{\displaystyle \Omega } which, when fixed, destroys all symmetry, i.e. its pointwise stabilizer is trivial. A base is irredundant if each element further reduces
Cameron–Fon-Der-Flaass IBIS theorem
Cameron–Fon-Der-Flaass_IBIS_theorem
Romanian-American mathematician (1935–2025)
with the following properties: (I) H is compact (for the topology of pointwise convergence); (II) H is convex; (III) H satisfies the "separation property"
Alexandra_Bellow
Topological construction
of topological spaces by a homotopy equivalent cofibration. Note that pointwise, a cofibration is a closed inclusion. Mapping cylinders are quite common
Mapping_cylinder
Mathematical use of "for all" and "there exists"
pointwise continuity, whose definitions differ only by an exchange in the positions of two quantifiers. A function f from R to R is called Pointwise continuous
Quantifier_(logic)
Mathematical operation on arithmetical functions
forms a commutative ring, the Dirichlet ring, with addition given by pointwise addition and multiplication by Dirichlet convolution. The multiplicative
Dirichlet_convolution
Calculus of vector-valued functions
as vector algebra, being defined for a vector space and then applied pointwise to a vector field. The basic algebraic operations consist of: Also commonly
Vector_calculus
Particular kind of algebraic structure
all bounded real- or complex-valued functions defined on some set (with pointwise multiplication and the supremum norm) is a unital Banach algebra. The
Banach_algebra
POINTWISE
POINTWISE
POINTWISE
POINTWISE
Girl/Female
Indian
Decorating the God, Divine
Boy/Male
Hindu
The sacred syllable
Boy/Male
Tamil
Shishidhar | ஷீஷீதாரÂ
Lord Shiva
Girl/Female
Muslim
Helper
Surname or Lastname
English and Irish
English and Irish : of uncertain origin; probably a derivative of Middle English shere ‘bright’, ‘fair’, with the addition of the Anglo-Norman French pejorative suffix -ard. It has been established in County Derry, Ireland, since the 17th century.
Boy/Male
Hindu, Indian
King of Snake
Girl/Female
Muslim
Virtuous, Pious, God-fearing and devoted to God
Surname or Lastname
Americanized spelling of German Deis.English
Americanized spelling of German Deis.English : probably a variant of Dice or Dye.
Boy/Male
British, Christian, English, French
Shining Pledge; Bright
Male
English
Anglicized form of Hebrew Eliyhuw, ELIHU means "He is my God." In the bible, this is the name of many characters, including a friend of Job.
POINTWISE
POINTWISE
POINTWISE
POINTWISE
POINTWISE