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Mathematical set with repetitions allowed
In mathematics, a multiset (or bag, or mset) is a modification of the concept of a set that, unlike a set, allows for multiple instances for each of its
Multiset
Abstract data type for storing distinct values
sets, allow also the insertion and deletion of elements from the set. A multiset is a special kind of set in which an element can appear multiple times
Set_(abstract_data_type)
Number of times an object must be counted for making true a general formula
mathematics, the multiplicity of a member of a multiset is the number of times it appears in the multiset. For example, the number of times a given polynomial
Multiplicity_(mathematics)
Graphical aid for deriving some concepts in combinatorics
is equal to the number of multisets of size k − 1 taken from a set of size n + 1, or equivalently, the number of multisets of size n taken from a set
Stars and bars (combinatorics)
Stars_and_bars_(combinatorics)
Approximate distinct counting algorithm
number of distinct elements in a multiset. Calculating the exact cardinality of the distinct elements of a multiset requires an amount of memory proportional
HyperLogLog
Number of subsets of a given size
choose k elements from a set of n elements if repetitions are allowed. See Multiset. There are ( n + k k ) {\displaystyle {\tbinom {n+k}{k}}} strings containing
Binomial_coefficient
Technique in topological data analysis
growing family of spaces. Formally, a persistence barcode consists of a multiset of intervals in the extended real line, where the length of each interval
Persistence_barcode
Mathematical space with a notion of distance
to a multiset of elements. A multiset is a generalization of the notion of a set in which an element can occur more than once. Define the multiset union
Metric_space
Total order in computer science
The multiset path ordering (>) can be defined as follows: where (≥) denotes the reflexive closure of the mpo (>), { s1,...,sm } denotes the multiset of
Path ordering (term rewriting)
Path_ordering_(term_rewriting)
Selection of items from a set
which repetition is allowed, the terms k-combination with repetition, k-multiset, or k-selection, are often used. If, in the above example, it were possible
Combination
Multiset of prime exponents in a prime factorization
In mathematics, the prime signature of a number is the multiset of (nonzero) exponents of its prime factorization. The prime signature of a number having
Prime_signature
Mathematical version of an order change
k-tuples over S is n k . {\displaystyle n^{k}.} If M is a finite multiset, then a multiset permutation is an ordered arrangement of elements of M in which
Permutation
Data organization and storage formats
type the data is Container List Tuple Associative array, Map Multimap Set Multiset (bag) Stack Queue (example Priority queue) Double-ended queue Graph (example
List_of_data_structures
Set of a matrix's eigenvalues
of a matrix is the set of its eigenvalues. (More precisely, it is its multiset of eigenvalues, where each eigenvalue comes with an associated multiplicity
Spectrum_of_a_matrix
Class templates in the C++ programming language
current revision of the C++ standard: std::set<T> std::map<K, V> std::multiset<T> std::multimap<K, V> Each of these containers differ only on constraints
Associative_containers_(C++)
Group of class templates in the C++ Standard Library
standard: std::unordered_set<T> std::unordered_map<K, V> std::unordered_multiset<T> std::unordered_multimap<K, V>. Each of these containers differ only
Unordered associative containers (C++)
Unordered_associative_containers_(C++)
Estimate of the importance of a word in a document
frequently in general. Like the bag-of-words model, it models a document as a multiset of words, without word order. It is a refinement over the simple bag-of-words
Tf–idf
Design pattern in functional programming to build generic types
properties Commutative? Idempotent? Details Ordered? Unique items? List No No Free monoid Yes No Finite multiset Yes No No No Finite set Yes Yes No Yes
Monad (functional programming)
Monad_(functional_programming)
Type of positive integer
An amenable number is a positive integer for which there exists a multiset of as many integers as the original number that both add up to the original
Amenable_number
mathematics, the Dershowitz–Manna ordering is a well-founded ordering on multisets named after Nachum Dershowitz and Zohar Manna. It is often used in context
Dershowitz–Manna_ordering
Character encoding standard
two-character prefix U+ was chosen as an ASCII approximation of U+228E ⊎ MULTISET UNION. a code point is an abstract representation of an UCS character by
Unicode
Natural number
i and j have the same number of digits and the multiset of the digits of n coincides with the multiset of the digits of i and j.)". The On-Line Encyclopedia
6000_(number)
Software library for the C++ programming language
The standard associative containers are set, multiset, map, multimap, hash_set, hash_map, hash_multiset and hash_multimap. There are also container adaptors
Standard_Template_Library
Punctuation and accent mark (~, ◌̃)
logical function NOT. and in APL it additionally represents the dyadic multiset function without (set difference). In C the tilde character is used as
Tilde
Branch of discrete mathematics
Inclusion–exclusion principle Combinatorics basics Combination · Permutation · Multiset · Combinatorial number system · List of permutation topics · Antichain
Combinatorics
Multiset analogue of matroids
integer polymatroid. In this sense, a polymatroid can be considered a multiset analogue of a matroid. Let E {\displaystyle E} be a finite set. If u ,
Polymatroid
Mathematical problem
any multiset of 2n − 1 integers has a subset of size n the sum of whose elements is a multiple of n, but that the same is not true of multisets of size
Zero-sum_problem
Musical scale in intonation
whose pitches can be expressed as products of some of the members of some multiset of generating prime factors. Powers of two are usually ignored, because
Euler–Fokker_genus
Number of occurrences in an experiment or study
Empirical distribution function Law of large numbers Multiset multiplicity, analogous to frequency in multiset theory Probability density function Probability
Frequency_(statistics)
Mathematical technique
applied to the nth slot. This creates multisets in the unlabelled case and sets in the labelled case (there are no multisets in the labelled case because the
Symbolic method (combinatorics)
Symbolic_method_(combinatorics)
Finite ordered list of elements
3\}=\{3,2,1\}} . A tuple has a finite number of elements, while a set or a multiset may have an infinite number of elements. There are several definitions
Tuple
Type of programming language
singleton multiset, and ⊎ {\displaystyle \uplus } is the multiset union operation. The semantics is then defined as a reduction relation on a multiset M → M
Linda_(coordination_language)
Natural number
tilings of a 12-gon 909 = 32 × 101, number of non-isomorphic aperiodic multiset partitions of weight 7 910 = 2 × 5 × 7 × 13, Mertens function(910) returns
900_(number)
Description of the behaviour of bosons
{\displaystyle S(4,3)} can be thought of as a multiset of cardinality n = 4 {\displaystyle n=4} ; the elements of such multiset are taken from the set { 1 , 2 , 3
Bose–Einstein_statistics
Set of data elements in databases
"relation"; although there is the difference in that a table is usually a multiset (bag) of rows where a relation is a set and does not allow duplicates.
Table_(database)
Any collection of sets, or subsets of a set
of mathematics, family or collection is used to mean set, indexed set, multiset, tuple, or class. It is usually used in phrases like "family of sets" because
Family_of_sets
Model to describe distributed systems
the elementary net so that N = (P, T, F) is a net. M: P → Z is a place multiset, where Z is a countable set. M extends the concept of configuration and
Petri_net
Abstract data type
Queue Double-ended queue Priority queue Double-ended priority queue Set Multiset Disjoint-set Arrays Bit array Circular buffer Dynamic array Hash table
Stack_(abstract_data_type)
NP-complete problem in computer science
problem, or number partitioning, is the task of deciding whether a given multiset S of positive integers can be partitioned into two subsets S1 and S2 such
Partition_problem
Heuristic test for graph isomorphism
refinement, repeatedly updates the color of each vertex according to the multiset of colors of its neighbors until a stable color configuration is reached
Weisfeiler Leman graph isomorphism test
Weisfeiler_Leman_graph_isomorphism_test
Continuous range of values, such as wavelengths in physics
neurodevelopmental disorders. In mathematics, the spectrum of a matrix is the multiset of the eigenvalues of the matrix. In functional analysis, the concept of
Spectrum
Algebra of formal sums
thought of as signed multisets containing finitely many elements of B {\displaystyle B} , with the multiplicity of an element in the multiset equal to its coefficient
Free_abelian_group
initialization expression i. The initialization expression must evaluate to multiset of tokens with a color corresponding to the color of the place C(p). A
Coloured_Petri_net
Israeli computer scientist
computer scientist, known e.g. for the Dershowitz–Manna ordering and the multiset path ordering used to prove termination of term rewrite systems. He obtained
Nachum_Dershowitz
Decision problem in computer science
problem in computer science. In its most general formulation, there is a multiset S {\displaystyle S} of integers and a target-sum T {\displaystyle T} ,
Subset_sum_problem
Chen prime. 1164 = number of chains of multisets that partition a normal multiset of weight 8, where a multiset is normal if it spans an initial interval
1000_(number)
Middle quantile of a data set or probability distribution
may be measurement or transcription errors. For example, consider the multiset 1, 2, 2, 2, 3, 14. The median is 2 in this case, as is the mode, and it
Median
Sets whose elements have degrees of membership
sets (Atanassov, 1983), fuzzy multisets (Yager, 1986), intuitionistic L-fuzzy sets (Atanassov, 1986), rough multisets (Grzymala-Busse, 1987), fuzzy rough
Fuzzy_set
Algebraic formula
a given ideal may be present more than once, so the list represents a multiset of primary ideals); the elements q i {\displaystyle q_{i}} are unique only
Elementary_divisors
Counting technique in combinatorics
must be generalized to multisets. For multisets instead of sets, (2) becomes where A − S {\displaystyle A-S} is the multiset for which ( A − S ) ⊎ S
Inclusion–exclusion_principle
Analysis of datasets using techniques from topology
persistence barcode is a multiset of intervals in R {\displaystyle \mathbb {R} } , and a persistence diagram is a multiset of points in Δ {\displaystyle
Topological_data_analysis
Data type in computer science
associative collections include: set multiset associative array graph tree A set can be interpreted as a specialized multiset, which in turn is a specialized
Collection (abstract data type)
Collection_(abstract_data_type)
Natural number
Eisenstein prime with no imaginary part the number of non-isomorphic self-dual multiset partitions of weight 10 678 = 2 × 3 × 113. It is: a sphenic number a nontotient
600_(number)
Unsolved problem about sums of powers
two disjoint multisets A and B of n integers each, whose first k power sum symmetric polynomials are all equal. That is, the two multisets should satisfy
Prouhet–Tarry–Escott_problem
Strongly NP-complete problem in computer science
whether a given multiset of integers can be partitioned into triplets that all have the same sum. More precisely: Input: a multiset S containing n positive
3-partition_problem
Mathematical optimization problem
generalization of the subset sum problem. The input to the problem is a multiset S {\displaystyle S} of n integers and a positive integer m representing
Multiple_subset_sum
Algebraic structure with an associative operation and an identity element
that in the end we produce just one element. For example, if we have a multiset, in a program it is represented as a map from elements to their numbers
Monoid
Natural number
series-reduced rooted trees whose leaves are integer partitions whose multiset union is an integer partition of 7. 886 = 2 × 443, the Mertens function
800_(number)
Mathematical concept in algebra
such a way that the multiset of eigenvalues of any polynomial P ( A , B ) {\displaystyle P(A,B)} in the two matrices is the multiset of the values P ( α
Commuting_matrices
Topics referred to by the same term
hunting), a quantity of fish caught or game killed Bag (mathematics) or multiset, a generalization of a set Bag (puzzle), a logic puzzle Bag (unit), various
Bag_(disambiguation)
Graph with oriented edges
graphs to have such multiple arcs (namely, they allow the arc set to be a multiset). Sometimes these entities are called directed multigraphs (or multidigraphs)
Directed_graph
Concept in mathematics
all finite multisets with elements drawn from A, with the monoid operation being multiset sum and the monoid unit being the empty multiset. For example
Free_monoid
Associative algebra used in combinatorics
Finite sub-multisets of some multiset E, ordered by inclusion The above three examples can be unified and generalized by considering a multiset E, and finite
Incidence_algebra
Document that proposed additions to the C++ standard library
implement the unordered_set, unordered_multiset, unordered_map, and unordered_multimap classes, analogous to set, multiset, map, and multimap, respectively
C++_Technical_Report_1
Theory of relational databases
Note: when implemented in SQL standard the "default projection" returns a multiset instead of a set, and the Π projection to eliminate duplicate data is obtained
Relational_algebra
Matrix with exactly one 1 per row and column
_{i}^{\,{\text{th}}}} roots of unity. The multiset union of the L i {\displaystyle L_{i}} is then the multiset of eigenvalues of P. Since writing ρ P {\displaystyle
Permutation_matrix
Matrix in graph theory (mathematics)
adjacency matrix of G from the adjacency matrix of the complement of G. The multiset of eigenvalues of this matrix is called the Seidel spectrum. The Seidel
Seidel_adjacency_matrix
Area within computer science
computing deals with distributed and parallel computing models, processing multisets of symbol objects in a localized manner. Thus, evolution rules allow for
Membrane_computing
Topics referred to by the same term
oriented manifold Signature of a knot, in knot theory Prime signature, the multiset of exponents in the prime factorisation of a number Signature (matrix)
Signature_(disambiguation)
Data structure holding key/value pairs
Template library ... some of its containers — the set<T>, map<T1, T2>, multiset<T>, and multimap<T1, T2> templates — are generally built using a special
Associative_array
Statistical measure of inter-rater agreement
all observers for an example is called a unit (it forms a multiset). We denote a multiset with these units as the items, U {\displaystyle U} . Alpha
Krippendorff's_alpha
Branch of mathematics that studies sets
languages. Likewise, sets and other collection-like objects, such as multisets and lists, are common datatypes in computer science and programming. In
Set_theory
rewriting can be based on relational algebra or an extension thereof (e.g. multiset relational algebra with sorting, aggregation and three-valued predicates
Query_rewriting
Type of permutation in combinatorial mathematics
mathematics, a Stirling permutation of order k is a permutation of the multiset 1, 1, 2, 2, ..., k, k (with two copies of each value from 1 to k) with
Stirling_permutation
Branch of non-classical logic
they are composed into more fine-grained structures, such as trees or multisets (sets that distinguish multiple occurrences of elements) or sequences
Substructural_logic
Generalization of the concept of category that allows morphisms of multiple arity
come from a monoidal category. Examples of multiorders include pointed multisets (sequence A262671 in the OEIS), integer partitions (sequence A063834 in
Multicategory
On bipartite matching and vertex cover
edges participating in the matching. A w-vertex-cover is a multiset of vertices ("multiset" means that each vertex may appear several times), in which
Kőnig's theorem (graph theory)
Kőnig's_theorem_(graph_theory)
Theorem of expressive equivalence between relational languages
treatment of nulls remains mired in controversy. Additionally, SQL has multiset semantics as allowing duplicate rows. Nevertheless, relational completeness
Codd's_theorem
Graph with multiple edges between two vertices
is an ordered pair G := (V, E) with V a set of vertices or nodes, E a multiset of unordered pairs of vertices, called edges or lines. A multigraph G is
Multigraph
Synthesizer
two effects into a Multiset, which allows for multi-timbral reception from a MIDI sequencer or master keyboard controller. Multisets have two major drawbacks
Korg_Wavestation
the cumulative reference list of an author's oeuvre is determined as the multiset union of the documents that the author has co-authored, then the author
Bibliographic_coupling
Probability distribution
) {\displaystyle \textstyle \left(\!\!{r \choose k}\!\!\right)} is the multiset coefficient. There are k failures chosen from k + r − 1 trials rather than
Negative binomial distribution
Negative_binomial_distribution
Sets with no element in common
some sources this is a set of sets, while other sources allow it to be a multiset of sets, with some sets repeated. An indexed family of sets ( A i ) i ∈
Disjoint_sets
Systematic classification of 12 related enumerative problems concerning two finite sets
include the classical problems of counting permutations, combinations, multisets, and partitions either of a set or of a number. The idea of the classification
Twelvefold_way
Topics referred to by the same term
the hypothalamus Multi-fiber Push-On, a type of optical fiber connector Multiset path ordering, a well-ordering in term rewriting (computer science) Matrix
MPO
Elements in exactly one of two sets
equivalent to the repeated symmetric difference of the join of the two multisets, where for each double set both can be removed. In particular: ( A Δ B
Symmetric_difference
Logical proof involving antecedents and consequents
the antecedent. In many cases, sequents are also assumed to consist of multisets or sets instead of sequences. Thus one disregards the order or even the
Sequent
Abstraction of linear independence of vectors
insignificant and can be ignored, but by letting E {\displaystyle E} be a multiset of vectors one brings the two definitions into complete agreement. Although
Matroid
Mathematical function
involving double factorials. Stirling permutations, permutations of the multiset of numbers 1, 1, 2, 2, ..., k, k in which each pair of equal numbers is
Double_factorial
Type of function in database management
"null") Stddev Formally, an aggregate function takes as input a set, a multiset (bag), or a list from some input domain I and outputs an element of an
Aggregate_function
respectively. The imbalance sequence M G {\displaystyle M_{G}} is the multiset of all edge imbalances in G {\displaystyle G} . A sequence of non-negative
Imbalance_conjecture
Data structure in computer science
programming language's API also provides Multimap and implementations. Multiset for the case where same item can appear several times "multimap<Key, Data
Multimap
Algorithm for estimating a count of distinct elements
Now the Flajolet–Martin algorithm for estimating the cardinality of a multiset M {\displaystyle M} is as follows: Initialize a bit-vector BITMAP to be
Flajolet–Martin_algorithm
Term in mathematics
intersection has a multidegree, written as the tuple (properly though a multiset) of the degrees of defining hypersurfaces. For example, taking quadrics
Complete_intersection
Group of standard library class templates
std::flat_multiset, and std::flat_multimap) use std::vector as the underlying container, unlike their "non-flat" equivalents (std::set, std::map, std::multiset
Sequence_container_(C++)
Infinite Cardinal number
of integers or of rationals or of algebraic numbers the set of finite multisets of integers the set of finite sequences of integers. Sets with cardinality
Beth_number
German geometer (1861–1927)
German geometer, known for Eberhard's theorem partially characterizing the multisets of faces that can form convex polyhedra. Eberhard was born on 17 January
Victor_Eberhard
German computer scientist
inaugural dissertation (Habilitationsschrift) on Quicksort variants for multisets. Examiners were Thomas Ottmann, Wolfgang Janko and Jan van Leeuwen (Utrecht)
Lutz_Michael_Wegner
French computer scientist (born 1947)
EATCS council. Jean Pierre Jouannaud; Pierre Lescanne (Sep 1982). "On Multiset Orderings" (PDF). Inf. Process. Lett. 15 (2): 57–63. doi:10.1016/0020-0190(82)90107-7
Jean-Pierre_Jouannaud
Relational database programming language
constructed types user-defined types. Constructed types are one of ARRAY, MULTISET, REF (reference), or ROW. User-defined types are comparable to classes
SQL
MULTISET
MULTISET
MULTISET
MULTISET
Boy/Male
Bengali, Hindu, Indian
Formless; Nirakar
Girl/Female
Indian
Memory
Girl/Female
Hindu, Indian
Member
Surname or Lastname
English
English : variant spelling of Turberville.
Female
Egyptian
, the wife of Ankh-pis-khe.
Boy/Male
Tamil
Boy/Male
Australian, French, Hebrew, Jewish, Thai
Life; Victory; Triumph
Girl/Female
Hindu
Devotional place, Pilgrimage spot, Varanasi, The holy city
Girl/Female
Tamil
Brightest star
Girl/Female
Hindu, Indian, Punjabi, Sikh
Beautiful
MULTISET
MULTISET
MULTISET
MULTISET
MULTISET