# Constants and Test Matrices

Pi, Not-a-Number, infinity; Hadamard, Companion, Pascal, and other specialized matrices

## Functions

 `eps` Floating-point relative accuracy `flintmax` Largest consecutive integer in floating-point format `i` Imaginary unit `j` Imaginary unit `Inf` Create array of all `Inf` values `pi` Ratio of circle's circumference to its diameter `NaN` Create array of all `NaN` values
 `allfinite` Determine if all array elements are finite `anynan` Determine if any array element is `NaN` `isfinite` Determine which array elements are finite `isinf` Determine which array elements are infinite `isnan` Determine which array elements are NaN
 `compan` Companion matrix `gallery` Test matrices `hadamard` Hadamard matrix `hankel` Hankel matrix `hilb` Hilbert matrix `invhilb` Inverse of Hilbert matrix `magic` Magic square `pascal` Pascal matrix `rosser` Classic symmetric eigenvalue test problem `toeplitz` Toeplitz matrix `vander` Vandermonde matrix `wilkinson` Wilkinson's eigenvalue test matrix