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Seems that IsDefined returns always true (1) when evaluating a variable passed through a function's argument (look at the attachment).
Davide (Friday, February 26, 2016 6:47 PM) #
I understand, thank you!
smath (Friday, February 26, 2016 5:01 PM) #
In the attached example "x" is defined. It is equal to "a".
Function arguments are always defined as it is impossible to call function in SMath Studio without specifying arguments.