check for vector (one-dimensional array)
type of the coefficient field
This function checks whether its first argument is a Maple vector. A vector is defined to be an one-dimensional array indexed from 1.
If the argument K is given, the function checks whether A is a vector with entries of type K .
Also, if K is given, it is essential to quote the word vector in order to avoid confusion with the vector function in the linalg package.
Note: The command vector has been superseded by Vector.
v ≔ array⁡2,23,1
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