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Number Theory & Combinatorics
Number Theory & Combinatorics
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FrobeniusSolve
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ContinuedFractionK
Convergents
CoprimeQ
DigitCount
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Divisors
EulerPhi
ExtendedGCD
FactorInteger
Fibonacci
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FrobeniusNumber
FromContinuedFraction
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Complex Numbers & Predicates
Complex Numbers & Predicates
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AbsArg
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NumberQ
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Bit Operations
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AddSides
AiryAi
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AngerJ
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ApplySides
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Circle
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EllipticE
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EulerE
ExpIntegralE
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Gamma
GammaRegularized
GegenbauerC
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HermiteH
Hypergeometric0F1
Hypergeometric0F1Regularized
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Hypergeometric2F1
Hypergeometric2F1Regularized
HypergeometricPFQ
HypergeometricPFQRegularized
HypergeometricU
InverseErf
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InverseJacobiCS
InverseJacobiDC
InverseJacobiDN
InverseJacobiDS
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JacobiSymbol
JacobiZeta
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LaguerreL
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LerchPhi
LogGamma
LogIntegral
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MeijerG
MultiplySides
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PrimeZetaP
QPochhammer
RealSign
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SinDegrees
SinIntegral
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SixJSymbol
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StruveH
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SubtractSides
ThreeJSymbol
WeberE
WeierstrassP
WeierstrassPPrime
WignerD
Zeta
Linear Algebra
Linear Algebra
Linear Algebra
Adjugate
AntihermitianMatrixQ
AntisymmetricMatrixQ
BoxMatrix
Cartesian
CellularAutomaton
CharacteristicPolynomial
ConjugateTranspose
Coordinates
CoordinatesFromCartesian
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Cross
CrossMatrix
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DiagonalMatrixQ
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DiamondMatrix
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Dot
DotProduct
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LinearSolve
LowerTriangularMatrixQ
LowerTriangularize
MatrixPower
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Norm
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NullSpace
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Pphi
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Projection
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QRDecomposition
ReflectionMatrix
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RotationTransform
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Rr
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ScalingMatrix
ScalingTransform
SetCoordinates
SingularValueDecomposition
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Spherical
SymmetricMatrixQ
Symmetrize
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Tr
TranslationTransform
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TuringMachine
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UnitaryMatrixQ
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UpperTriangularize
VectorAngle
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Polynomials
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Coefficient
CoefficientList
Discriminant
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Resultant
Algebraic Manipulation
Algebraic Manipulation
Algebraic Manipulation
Apart
Cancel
Collect
ExpToTrig
Expand
Factor
Together
TrigExpand
TrigReduce
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Math Utilities
Math Utilities
Utility Math Functions
Activate
AlphabeticOrder
ArcLength
Area
ArithmeticGeometricMean
Around
ArrayResample
Ball
BandpassFilter
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BinaryDistance
BrayCurtisDistance
CDF
CanberraDistance
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CentralMoment
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Chop
Clip
Complex
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Correlation
CorrelationDistance
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DiscreteDelta
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Expectation
Factorial2
FindLinearRecurrence
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FiniteAbelianGroupCount
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FromDMS
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GeometricMean
GroupGenerators
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HeavisideLambda
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HeavisideTheta
HighpassFilter
Hyperfactorial
Insphere
IntegerName
IntegerPartitions
IntegerReverse
InterquartileRange
Interval
IntervalIntersection
IntervalUnion
InverseGudermannian
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Kurtosis
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LambertW
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Line
LinearRecurrence
LiouvilleLambda
ListFourierSequenceTransform
LocationTest
Longitude
LowpassFilter
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ManhattanDistance
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MathMLForm
MaxFilter
MeanDeviation
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MemberQ
Midpoint
MinFilter
MixedFractionParts
ModularInverse
Moment
MultiplicativeOrder
NArgMax
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NorlundB
Normalize
NormalizedSquaredEuclideanDistance
Numerator
OutputForm
PDF
ParabolicCylinderD
PartitionsP
PauliMatrix
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PerfectNumber
Perimeter
PlanarAngle
Point
Polygon
PolygonalNumber
PrimitiveRoot
PrimitiveRootList
Probability
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Quantile
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RamanujanTau
Ramp
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RandomChoice
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RealAbs
Reap
Rectangle
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RegionEqual
RegionWithin
ReplaceList
Rescale
RogersTanimotoDissimilarity
RomanNumeral
RootMeanSquare
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SSSTriangle
SawtoothWave
SequenceForm
ShearingMatrix
Skewness
Sow
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SquareWave
SquaredEuclideanDistance
SquaresR
StandardDeviation
Standardize
Subdivide
Subfactorial
Tetrahedron
ToBoxes
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TraditionalForm
Triangle
TriangleWave
TrimmedMean
TrimmedVariance
UnitBox
UnitStep
UnitTriangle
Unitize
Upsample
Variables
Variance
WinsorizedMean
WinsorizedVariance
YuleDissimilarity
List Operations
List Operations
List Operations
AllMatch
AllSameBy
AnglePath
AnyMatch
BinLists
Blank
BlankSequence
CenterArray
ClusteringComponents
CountBy
Diagonal
FoldWhileList
Groupings
Heads
HistogramList
KeyMemberQ
List
ListConvolve
ListCorrelate
MovingMap
MovingMedian
Nearest
Operate
Order
PeakDetect
PermutationCyclesQ
PermutationLength
PermutationMax
PermutationMin
PermutationOrder
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PermutationSupport
PowerRange
SequenceCases
SequencePosition
Splice
SubsetCases
SubsetCount
SubsetMap
SubsetPosition
TensorProduct
TensorRank
Basics
Basics
List Basics
Append
Array
Catenate
ConstantArray
Delete
Dimensions
Drop
Extract
First
Insert
Join
Last
Length
Most
Part
Prepend
Range
Rest
Reverse
Riffle
Sort
Table
Take
Transforming
Transforming
Transforming Lists
Apply
ArrayFlatten
ArrayPad
ArrayReshape
ArrayRules
BlockMap
ComposeList
Composition
Flatten
FlattenAt
FoldPairList
Identity
Inner
Map
MapAll
MapApply
MapAt
MapIndexed
MapThread
Normal
Outer
PadLeft
PadRight
Pick
ReplacePart
RightComposition
RotateLeft
RotateRight
Scan
SparseArray
Thread
Transpose
Sorting & Ordering
Sorting & Ordering
Sorting and Ordering
FindPermutation
InversePermutation
MaximalBy
MinimalBy
OrderedQ
Ordering
PermutationListQ
Permutations
ReverseSort
ReverseSortBy
Signature
SortBy
Searching & Filtering
Searching & Filtering
Searching and Filtering
AnyTrue
Cases
Commonest
Count
CountDistinct
Counts
CountsBy
DeleteAdjacentDuplicates
DeleteCases
DeleteDuplicates
DeleteDuplicatesBy
DuplicateFreeQ
FirstCase
FirstPosition
FreeQ
LengthWhile
NoneTrue
Position
PositionIndex
Select
SelectFirst
SequenceCount
TakeLargestBy
TakeSmallestBy
TakeWhile
Tally
Set Operations
Set Operations
Set Operations
Complement
ContainsAll
ContainsAny
ContainsNone
ContainsOnly
DisjointQ
IntersectingQ
Intersection
MinMax
SquareMatrixQ
Subsequences
Subsets
SymmetricDifference
Union
Grouping & Partitioning
Grouping & Partitioning
Grouping and Partitioning
BinCounts
Downsample
Gather
GatherBy
GroupBy
Partition
Split
SplitBy
TakeDrop
TakeList
Statistics
Statistics
Statistics and Summaries
Accumulate
Differences
Mean
Median
Product
Ratios
Total
Functions
Functions
Functions
AddTo
Apply
ArcSinDistribution
ArrayDepth
BernoulliDistribution
BetaDistribution
BinomialDistribution
Block
Catch
CauchyDistribution
CensoredDistribution
Check
ChiDistribution
ChiSquareDistribution
CompoundExpression
DateString
Decrement
DiscreteUniformDistribution
DistributionParameterQ
DivideBy
Do
Evaluate
ExponentialDistribution
ExtremeValueDistribution
FRatioDistribution
FixedPoint
FixedPointList
Fold
FoldList
For
FrechetDistribution
GammaDistribution
GeometricDistribution
GompertzMakehamDistribution
HalfNormalDistribution
HoldForm
If
Increment
InverseChiSquareDistribution
InverseGammaDistribution
InverseGaussianDistribution
LaplaceDistribution
LogNormalDistribution
LogisticDistribution
MultinomialDistribution
MultivariatePoissonDistribution
Names
NegativeBinomialDistribution
Nest
NestList
NestWhile
NestWhileList
NormalDistribution
NumericArray
ParetoDistribution
Piecewise
PoissonDistribution
PreDecrement
PreIncrement
Quiet
RayleighDistribution
Return
Run
StudentTDistribution
SubtractFrom
Switch
TakeLargest
TakeSmallest
Through
Throw
TimeConstrained
TimeRemaining
TimesBy
UniformDistribution
ValueQ
WeibullDistribution
Which
While
With
Associations
Associations
Associations
Association
AssociationMap
AssociationThread
Dataset
FilterRules
GroupBy
JoinAcross
KeyDrop
KeyDropFrom
KeyExistsQ
KeyMap
KeySelect
KeySort
KeySortBy
KeyTake
KeyUnion
KeyValueMap
Keys
Length
Lookup
Map
Merge
Normal
Tabular
ToTabular
Values
Expressions
Expressions
Expressions
Hyperlink
Assuming
BlankNullSequence
ByteArray
ByteCount
Clear
CMYKColor
ChebyshevDistance
ClearAll
ClearAttributes
Closing
Compile
Construct
Context
Cuboid
Default
Definition
Depth
Dilation
DisplayForm
Echo
EntityClassList
EntityList
EntityProperties
EntityRegister
EntityStore
EntityStores
EntityUnregister
EntityValue
Erosion
Expression
Format
FractionBox
FrameBox
FullDefinition
FullForm
GraphCenter
GraphDiameter
GraphPeriphery
GraphRadius
GrayLevel
Grid
GridBox
HalfPlane
HalfSpace
Head
Hold
HoldComplete
Hue
In
InfiniteLine
InfinitePlane
Information
InputForm
InterpretationBox
LeafCount
Level
MakeBoxes
MatrixForm
Number
Opening
OrthogonalMatrixQ
Out
OverscriptBox
ParallelMap
ParallelTable
Protect
RadicalBox
Rational
RawBoxes
ReleaseHold
RepeatedNull
Row
RuleDelayed
SetAttributes
SetDelayed
Slot
SlotSequence
Span
Sphere
SqrtBox
Stack
StandardForm
String
StyleBox
SubscriptBox
SubsuperscriptBox
SuperscriptBox
SymbolQ
TableForm
TagBox
TagSet
TensorDimensions
Trace
Undefined
UnderoverscriptBox
UnderscriptBox
Unevaluated
Unprotect
UpSet
UpSetDelayed
VertexEccentricity
XYZColor
Replacement Rules
Replacement Rules
Replacement rules tests
Replace
ReplaceAll
ReplaceRepeated
Rule
RuleDelayed
Symbolic
Symbolic
Symbolic Computing
ArcCurvature
AsymptoticIntegrate
AsymptoticSolve
CoefficientArrays
CoefficientRules
Curl
Cyclotomic
D
DifferenceDelta
DifferenceQuotient
DiscreteConvolve
DiscreteLimit
DSolve
DSolveValue
Decompose
Derivative
Distribute
Div
Dt
Eliminate
ExpandAll
ExpandDenominator
ExpandNumerator
ExponentialGeneratingFunction
FactorList
FactorSquareFree
FactorSquareFreeList
FactorTerms
FactorTermsList
FindArgMax
FindArgMin
FindClusters
FindFit
FindInstance
FindMaximum
FindMinimum
FindRoot
Fourier
FourierCosTransform
FourierSinTransform
FourierTransform
FrenetSerretSystem
FromCoefficientRules
FullSimplify
FunctionDomain
FunctionExpand
GeneratingFunction
Grad
HornerForm
Integrate
InterpolatingPolynomial
Interpolation
InverseFourier
InverseFourierTransform
InverseFunction
InverseLaplaceTransform
LaplaceTransform
Laplacian
Limit
ListInterpolation
MatrixExp
MaxLimit
Maximize
MinLimit
MinimalPolynomial
Minimize
MonomialList
NDSolve
NDSolveValue
NIntegrate
NMaximize
NMaxValue
NMinimize
NMinValue
NSolve
PolynomialMod
PolynomialQ
PolynomialQuotientRemainder
Product
RecurrenceTable
Reduce
Refine
Root
Roots
RSolve
Series
SeriesCoefficient
Simplify
Solve
SolveAlways
Sum
SymmetricPolynomial
ToRadicals
ToRules
Tuples
Wronskian
Module
Plotting
Plotting
Plotting
ArrayPlot
BarChart
BarChart3D
BoxWhiskerChart
BubbleChart
ComplexPlot
ContourPlot
DateListPlot
DensityPlot
DiscretePlot
DiscretePlot3D
FrameRate
Graphics
Graphics3D
GraphicsColumn
GraphicsGrid
GraphicsRow
Histogram
KochCurve
LinearGradientFilling
ListContourPlot
ListDensityPlot
ListLinePlot
ListLogLinearPlot
ListLogLogPlot
ListLogPlot
ListPlot
ListPlot3D
ListPointPlot3D
ListPolarPlot
ListStepPlot
LogLinearPlot
LogLogPlot
LogPlot
Manipulate
MatrixPlot
NumberLinePlot
ParametricPlot
ParametricPlot3D
PieChart
PieChart3D
Plot
Plot3D
PolarPlot
RegionPlot
RegionPlot3D
RevolutionPlot3D
SectorChart
Show
SphericalPlot3D
StreamDensityPlot
StreamPlot
TreeForm
TreeGraph
VectorPlot
VectorPlot3D
WordCloud
Images
Images
Images
BMP
Binarize
Blur
ColorConvert
ColorData
ColorDistance
ColorNegate
ConstantImage
DominantColors
EdgeDetect
GIF
Image
ImageAdd
ImageAdjust
ImageApply
ImageAspectRatio
ImageAssemble
ImageChannels
ImageCollage
ImageColorSpace
ImageCompose
ImageCrop
ImageData
ImageDimensions
ImageMultiply
ImageQ
ImageReflect
ImageResize
ImageRotate
ImageSubtract
ImageTake
ImageTrim
ImageType
JPEG
JPG
PixelValuePositions
RandomImage
Rasterize
Sharpen
TIF
TIFF
Dates & Time
Dates & Time
Dates & Time
Pause
AbsoluteTime
AbsoluteTiming
DateDifference
DateInterval
DateList
DateObject
DatePlus
DateString
DayCount
DayName
DayPlus
LeapYearQ
Now
SessionTime
TimeUsed
Timing
Today
UnixTime
Quantities
Quantities
Quantity
CompatibleUnitQ
KnownUnitQ
Quantity
QuantityMagnitude
QuantityQ
QuantityUnit
UnitConvert
File System & I/O
File System & I/O
File System & I/O
AbsoluteFileName
AnimationRate
BinaryRead
BinaryWrite
Close
CreateFile
Directory
DirectoryName
DirectoryStack
Environment
ExpandFileName
Export
ExportString
FileBaseName
FileByteCount
FileDate
FileExtension
FileFormat
FileHash
FileNameDepth
FileNameDrop
FileNameJoin
FileNameSplit
FileNames
Find
FindFile
Get
GetEnvironment
ImageResolution
Import
ImportString
Message
OpenAppend
OpenRead
OpenWrite
PNG
ParentDirectory
Put
PutAppend
Read
ReadLine
ReadList
ReadString
ResetDirectory
Save
SetDirectory
SetEnvironment
SetStreamPosition
Skip
StreamPosition
Streams
StringToStream
TemplateApply
ToFileName
URLBuild
URLFetch
Write
WriteString
Scripting
Jupyter
Studio
Effect Levels
Resources
Related
Introduction
Syntax
List Operations
CountBy
¶
Groups and counts elements by a function.
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