Similarly, I guess that rootOf is a library function (implemented in
Spad), and is not a language operation (like +, * ...) for forming an
arithmetical expression (is it?).
Library function.
Bill also wanted to say that + and * are library defined functions
except for a few basic domains like Integer. But for example,
addition/multiplication with rational numbers is defined in the Fraction
domain constructor. And there +,-,*,/ are defined in the library.
Ralf
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