Wolfram Resource System

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Search the Wolfram Resource System

Paclet Resource: Wolfram/QuantumFramework

Perform analytic and numeric quantum computations

Paclet Resource: Wolfram/Lazy

Lazy computation

Paclet Resource: Wolfram/GitLink

Integrate git functionality into the Wolfram Language

Paclet Resource: StianRamsnes/MaXrd

Symmetry data and utilities related to crystallography and X-ray scattering

Paclet Resource: PeterBurbery/RecreationalMathematics

This paclet is for recreational mathematics and math puzzles

Paclet Resource: Obando/CAGenetics

A set of functions to manipulate the unified model of Cellular Automata

Paclet Resource: LawrenceWinkler/MatrixDecomposition

Various simple matrix decompositions algorithms and support functions

Paclet Resource: KlausSutner/Automata

Automata theory package

Paclet Resource: AntonAntonov/DimensionReducers

Dimension reduction algorithms

Paclet Resource: AntonAntonov/DataReshapers

Data reshaping functions

Function Resource: PermutationInvolutionQ

Test whether a permutation equals its inverse

Function Resource: InversionCount

Count the number of pairs of out-of-order elements in a permutation

Function Resource: InverseFibonacci

Compute the inverse Fibonacci function

Function Resource: TridiagonalInverse

Evaluate the inverse of a tridiagonal matrix

Function Resource: ComplementPermutation

Get the complement of a permutation

Function Resource: RadicalInverse

Compute the radical inverse of an integer to a given base

Function Resource: InverseBoole

Inverse of the Boole function

Function Resource: PermutationGraph

Compute the permutation graph of a permutation

Function Resource: JosephusPermutation

Find the solution of the Josephus problem

Function Resource: InverseFactorial

Compute the inverse factorial of a strictly positive integer by solving the gamma function for a specific value

Function Resource: StringPermutations

Get character permutations for a string

Function Resource: SelectPermutations

Get permutations that satisfy a certain criterion

Function Resource: EvenPermutations

Get even permutations of a list

Function Resource: PermutationToTableaux

Get the two Young tableaux corresponding to a permutation

Function Resource: PermutationIndex

Give the lexicographic index of a permutation

Function Resource: PermutationMajorIndex

Compute the major index of a permutation

Function Resource: SignedPermutations

Get all signed permutations of a list

Function Resource: TableauxToPermutation

Get a permutation corresponding to two Young tableaux

Function Resource: InverseEllipticE

Evaluate the inverse function of EllipticE

Function Resource: PermutationAscents

Give the indices of a permutation where there is an immediate ascent

Function Resource: PermutationCountByInversions

Get the number of permutations having a specified length and number of inversions

Function Resource: NextPermutation

Get the next permutation in lexicographic order

Function Resource: AlternatingPermutationQ

Determine whether a permutation is an alternating permutation

Function Resource: AssociationPermutations

Get permutations of the key-value pairs in an Association

Function Resource: BaxterPermutationQ

Determine whether a permutation is a Baxter permutation

Function Resource: InverseFourierCoefficient

Find a function with a given Fourier exponential series

Function Resource: PermutationCyclesGraph

A graph representing cycles and fixed points of a permutation

Function Resource: SwapOrderedPermutations

Construct a list of permutations so that successive permutations differ by exactly one transposition

Function Resource: InverseStereographicProjection

Compute the parametrization of a curve projected onto the unit sphere

Function Resource: PermutationCountByCycleLength

Calculate the number of permutations of the specified cycle length counts

Function Resource: PermutationSkewSum

Compute the skew sum of permutation lists

Function Resource: PermutationDirectSum

Compute the direct sum of permutation lists

Function Resource: FindAllPermutations

Find all permutations of lists with non-unique elements

Function Resource: MaximizeOverPermutations

Find the permutation that maximizes a function

Paclet Resource: ZigangPan/CalculateInverse

This paclet is some basic utility functions

Function Resource: NInverseFourierTransform

Find a numerical approximation for the inverse Fourier transform

Function Resource: FourierShiftInverse

Invert a zero-frequency shift

Function Resource: PermutationFromIndex

Give the permutation corresponding to a given length and lexicographic index

Function Resource: ReverseAlternatingPermutationQ

Determine whether a permutation is a reverse alternating permutation

Function Resource: MinSumPermutation

Find a permutation that minimizes a matrix sum

Function Resource: InverseGrayCode

Find the integer corresponding to a given Gray code

Function Resource: JacobiShufflePermutations

Generate a set of permutations for Jacobi identities of arbitrary order

Function Resource: NInverseFourierCoefficient

Find a numerical approximation for a function with a given Fourier exponential series

Function Resource: NInverseFourierSinTransform

Find a numerical approximation for an inverse Fourier sine transform

Function Resource: CycleLengthCountList

List the possible cycle length counts of permutations of a given length

Function Resource: NInverseLaplaceTransform

Find the numerical approximation for the inverse Laplace transform

Function Resource: LehmerCodeFromPermutation

Create the Lehmer code corresponding to a given permutation

Function Resource: NInverseFourierCosTransform

Find a numerical approximation for an inverse Fourier cosine transform

Function Resource: InverseSigmaConfidenceLevel

Calculate the number of standard deviations of a normal distribution that correspond to a confidence level

Function Resource: NInverseFourierSequenceTransform

Find a numerical approximation to the inverse Fourier sequence transform of a periodic function

Function Resource: CycleLengthCounts

Count the number of cycles for all possible cycle lengths in a permutation

Function Resource: GracefulGraphFromPermutation

Show the graceful graph corresponding to a given permutation

Function Resource: FromInversionVector

Construct the permutation list corresponding to the given inversion vector

Function Resource: Unthread

A partial inverse for Thread

Paclet Resource: PeterBurbery/Combinatorics

Combinatorics functions for subsets, tuples, and permutations

Paclet Resource: PeterBurbery/CombinatoricsPaclet

Combinatorics functions for subsets, tuples, and permutations

Function Resource: FindGroupIsomorphism

Find up to a specified number of isomorphisms between two permutation groups

Function Resource: ArcTanIntegral

Evaluate the inverse tangent integral

Function Resource: ArcCotDegree

Compute the inverse cotangent of a number and return a result in degrees

Function Resource: ArcCosDegree

Compute the inverse cosine of a number and return a result in degrees

Function Resource: ArcSinDegree

Compute the inverse sine of a number and return a result in degrees

Function Resource: ArcSecDegree

Compute the inverse secant of a number and return a result in degrees

Function Resource: ArcCscDegree

Compute the inverse cosecant of a number and return a result in degrees

Function Resource: ArcTanDegree

Compute the inverse tangent of a number and get a result in degrees

Function Resource: EquivalentOrderings

Generalize Ordering by giving alternative orderings if there are equal items

Function Resource: Involutions

List permutations comprised only of cycles of size two or less

Function Resource: InversionCurve

Compute the inversion of a curve

Function Resource: ScatteredInterpolation

Perform interpolation in n-dimensional space for irregularly spaced data

Function Resource: StereographicProjection

Compute the stereographic projection from the unit sphere to a plane

Function Resource: RandomDerangement

Find a random derangement of the numbers 1 through n

Example Resource: Ecological Alpha Diversity

Compute common measures of ecological α-diversity on a dataset of species abundance by site

Function Resource: ShuffleOrder

Determine how many shuffles restore the list of specified size to its original order

Function Resource: CanonicalListRotation

Return a canonical rotation for a list of values

Function Resource: SalzerPiessensInversionWeights

Get a list of abscissas and weights for the numerical inverse Laplace transform

Paclet Resource: TheRealCStover/Trigonometry

A collection of lesser-known circular and hyperbolic trig functions and their inverses

Function Resource: EulerianNumber

Get the number of permutations with a given number of ascents

Function Resource: DerangementQ

Test whether a permutation is a derangement

Paclet Resource: ZigangPan/NonlinearCholeskyFactorization

Design locally optimal and globally inverse optimal controllers for nonlinear system under perfect state measurement

Function Resource: QuadratureWeightsToJacobiMatrix

Recover a Jacobi matrix from a list of abscissa-weight pairs

Function Resource: SchettPolynomial

Compute the Schett polynomial

Function Resource: NFourierTransform

Find a numerical approximation for a Fourier transform

Function Resource: TransposeTableau

Transpose a Young tableau

Function Resource: ToInversionVector

Get the inversion vector of a permutation written as a list

Function Resource: CommutationMatrix

Generate a commutation matrix

Function Resource: IteratedLog

Determine the iterated logarithm of an input

Function Resource: DescendingSublists

Split a list at its left-to-right maxima

Function Resource: InversionVectorQ

Check if a list is the inversion vector of a permutation written as a list

Function Resource: SubsetGroup

Compute a group induced by a permutation group on k-subsets

Function Resource: FindFanoPlaneIsomorphism

Enumerate all isomorphisms given a configuration of a Steiner triple system (2, 3, 7) on the Fano plane

Function Resource: GenerateVerificationTests

Generate a VerificationTest file for all permutations of arguments

Function Resource: Cofactor

Get a cofactor of a matrix

Function Resource: NFourierCoefficient

Find a numerical approximation for a Fourier exponential series coefficient of a function

Function Resource: NFourierSeries

Find a numerical approximation for an exponential Fourier series expansion of a function

Function Resource: BinaryIteratedLog

Get the binary iterated logarithm of a positive number

Function Resource: NFourierCosTransform

Find a numerical approximation for a Fourier cosine transform

Function Resource: NFourierSinTransform

Find a numerical approximation for a Fourier sine transform

Function Resource: NFourierTrigSeries

Find a numerical approximation for a trigonometric Fourier series expansion of a function

Function Resource: NFourierSinCoefficient

Find a numerical approximation for a Fourier sine coefficient of a function

Function Resource: NFourierCosCoefficient

Find a numerical approximation for a Fourier cosine coefficient of a function

Function Resource: NSeries

Find a numerical approximation of a series expansion of a function

Function Resource: FoxHToMeijerG

Express FoxH in terms of MeijerG whenever applicable

Function Resource: CofactorMatrix

Give the matrix of cofactors for a given input matrix

Function Resource: NResidue

Find a numerical approximation of a residue of an expression around the specified point

Function Resource: SimplexOrientation

Get the orientation of a simplex

Function Resource: AutomorphismGraph

Find an undirected graph whose automorphism group is isomorphic to the given group

Paclet Resource: ZigangPan/NonlinearCholeskyFactorizationMIMO

Nonlinear Cholesky Factorization for MIMO nonlinear systems

Function Resource: Ranking

Find the rank of each of the items in a list

Example Resource: Knight's Tour on a Chessboard

Simulate a knight's tour in a recursive manner

Function Resource: FunctionJectivity

Determine the injectivity and surjectivity of a function

Function Resource: FactorialSeriesExpansion

Expand a function into a factorial series

Function Resource: Shuffle

Rearrange elements of a list

Function Resource: ShapeOperator

Compute the shape operator on a surface

Function Resource: LinesImage

Calculates straight lines which collectively approximate a given image

Function Resource: DiscreteHilbertTransform

Compute the discrete Hilbert transform of a list

Paclet Resource: ZigangPan/MRRACLinearFullOrder

Model reference robust adaptive control design for MIMO LTI systems

Paclet Resource: ZigangPan/NonlinearSystems

This is a paclet on nonlinear systems with the ultimate goal of robust MRAC for linear systems

Paclet Resource: PeterBurbery/BooleanLogic

Work with logical functions and boolean values

Paclet Resource: ZigangPan/RobustBackSteppingCancellation

A few robust backstepping tools

Paclet Resource: ZigangPan/LinearSystems

This Paclet is on LTI systems for the ultimate goal of a robust MRAC for minimum phase linear systems

Paclet Resource: ZigangPan/LinearQuadraticControl

This Paclet is for LQR, LQG, LEQG, and H-infinity Control design

Paclet Resource: ZigangPan/SystemofSystems

Robust MRAC design for minimum phase composite system that consists of parallel interconnected MIMO LTI systems

Function Resource: LinearlyConsistentQ

Determine if a linear system has a solution

Function Resource: ParityPairings

List all possible partitions of a list into disjoint pairs

Function Resource: MultisetDerangements

Find derangements for a multiset

Function Resource: HyperDet

Compute the hyperdeterminant for a given hypermatrix (a multidimensional array of complex numbers)

Function Resource: NumberOfTableaux

Get a count of Young tableaux for a given size or shape

Function Resource: TableauQ

Determine if a list of values forms a Young tableau

Function Resource: StandardYoungTableaux

Enumerate all standard Young tableaux of a given shape

Example Resource: Radon Transforms

Transform an image to appear as in a medical CT scan

Function Resource: SymbolicFourier

A symbolic version of the Fourier function

Function Resource: LoxodromeDistance

Compute the loxodrome distance between two points on a unit sphere

Function Resource: GenericInvariant

Compute the generic invariant of a group

Function Resource: Derangements

Give all the ways the numbers 1, 2, …, n can be scrambled completely

Function Resource: TrigApproximateList

Generate a trig series that approximates a list of data

Function Resource: OutShuffle

Perform an out shuffle on a list

Function Resource: InShuffle

Perform an in shuffle on a list

Function Resource: ChoquetIntegral

Compute numerically the Choquet integral of a function with respect to a probability distribution

Function Resource: DiscreteHartleyTransform

Compute the discrete Hartley transform of a list

Function Resource: CarlemanMatrix

Evaluate the Carleman matrix of a function

Function Resource: FractionMod

Get a congruent integer for a given fraction and modulus

Example Resource: Multiscale Image Representation with Image Pyramids

Create Gaussian and Laplacian pyramids to facilitate efficient multiscale image processing

Function Resource: MatrixMinimalPolynomial

Compute the minimal polynomial of a square matrix

Function Resource: MercerMatrix

Generate a Mercer matrix

Function Resource: NumberTheoreticTransform

Compute the number-theoretic transform of a list of integers

Function Resource: MultinormalKLDivergence

Compute the Kullback–Leibler divergence between two multinormal distributions

Function Resource: FaurePoint

Get a point belonging to the Faure sequence

Function Resource: FastFourierGraph

Create a fast Fourier transform calculation in graphical form

Example Resource: Smooth Image Assembly using Multiscale Blending

Split and merge two images at different scales using image pyramids

Function Resource: BulirschEL1

Evaluate Bulirsch's incomplete elliptic integral of the first kind

Function Resource: MultiwaySemigroup

Simulate an arbitrary (potentially commutative) semigroup as a multiway system

Function Resource: MultiwayGroup

Simulate an arbitrary (potentially abelian) group as a multiway system

Function Resource: MultiwayMonoid

Simulate an arbitrary (potentially commutative) monoid as a multiway system

Function Resource: ProjectionMatrix

Compute the projection matrix for a given vector space

Function Resource: RowSpace

Compute properties of the row space of a matrix

Function Resource: ColumnSpace

Compute properties of the column space of a matrix

Example Resource: Efficient Image Zooming Using Multiscale Pyramids

Create a Gaussian image pyramid for zooming into a large image

Example Resource: Measurement of Dye Concentration

Use a color deconvolution algorithm to separate a microscopy image of stained tissue samples

Function Resource: LinearAlgebraMod

Perform matrix operations over a finite field

Example Resource: Build a Vocoder Using STFT Transformations

Impose the spectral envelope of a modulator signal onto a carrier

Example Resource: Discrete-Time Fourier Transform of a Moving-Average Filter

Obtain and visualize the frequency response of a 2D moving-average filter

Example Resource: Use Contours to Make Hand Drawings

Create hand drawings of objects in images using Fourier of contour points

Function Resource: StauduharGaloisGroup

Use Stauduhar's method for Galois groups of polynomials

Function Resource: Nullity

Compute the nullity of a matrix

Function Resource: QuadraticResidues

Compute the quadratic residues of an integer