REALVARDEF
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Syntax
REALVARDEF symbol
Implemented in iMath since version 2.2.0 or earlier.
Explanation
Defines the symbol to be real-valued. This allows iMath to evaluate some functions immediately, e.g. complex conjugation.
Note that the real-valued symbol is not identical with another symbol that has the same name but a different domain. To avoid confusion, always define your symbols as real before you use them for the first time.
Example
REALVARDEF x tells iMath that x always has a real value and therefore conjugate(x) = x.