Return true if the input is a Smith number in base ten. Otherwise, return false. Read about Smith numbers at http://en.wikipedia.org/wiki/Smith_number.
A Smith number must be positive and have more than one factor.
Basics: 'Find the eigenvalues of given matrix
Sum the numbers on the main diagonal
Find nth maximum
Polite numbers. N-th polite number.
Test within tolerance
Get input and output variable names
Remove TeX from string
Split up vector or matrix delimited by NaNs
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