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.
The Goldbach Conjecture, Part 2
Filter AC, pass DC
letter yes yes & letter no no
Return elements unique to either input
Get the length of a given vector
Remove TeX from string
Get input and output variable names
Split up vector or matrix delimited by NaNs
Test within tolerance
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