LinearSolve (Built-in Mathematica Symbol)

LinearSolve[m, b] finds an x which solves the matrix equation m.x == b. LinearSolve[m] generates a LinearSolveFunction[...] which can be applied repeatedly to different b.

Graphs and Matrices (Mathematica Guide)

Matrix representations of graphs go back a long time and are still in some areas the only way to represent graphs. Adjacency matrices represent adjacent vertices and ...

Searching and Reading Strings (Mathematica Tutorial)

Functions like Read and Find are most often used for processing text and data from external files. In some cases, however, you may find it convenient to use these same ...

NumberOfDirectedGraphs (Combinatorica Package Symbol)

NumberOfDirectedGraphs[n] returns the number of nonisomorphic directed graphs with n vertices. NumberOfDirectedGraphs[n, m] returns the number of nonisomorphic directed ...

NumberOfGraphs (Combinatorica Package Symbol)

NumberOfGraphs[n] returns the number of nonisomorphic undirected graphs with n vertices. NumberOfGraphs[n, m] returns the number of nonisomorphic undirected graphs with n ...

NumberOfPermutationsByInversions (Combinatorica Package Symbol)

NumberOfPermutationsByInversions[n, k] gives the number of permutations of length n with exactly k inversions. NumberOfPermutationsByInversions[n] gives a table of the number ...

NaN (Computer Arithmetic Package Symbol)

NaN is the symbol used by the functions in the Computer Arithmetic Package to represent a nonrepresentable number.

Compress (Built-in Mathematica Symbol)

Compress[expr] gives a compressed representation of expr as a string.

SessionTime (Built-in Mathematica Symbol)

SessionTime[] gives the total number of seconds of real time that have elapsed since the beginning of your Mathematica session.

MTensor_getFlattenedLength (Mathematica LibraryLink C Function)

mint MTensor_getFlattenedLength (MTensor t) gets the total number of elements in an MTensor.