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2 votes
1 answer
132 views

Can I tell whether a symbol is build-in (part of the System` library)?

I'd like a function that checks whether a symbol is a predefined part of the language or not. More generally, it might check whether it's part of a given package. ...
user3257842's user avatar
1 vote
1 answer
98 views

any possible meaning to a "terminal" slash (/)? [closed]

I've been directed to the web page http://functions.wolfram.com/07.31.16.0001.01 The first statement in the formula is ...
Paul B. Slater's user avatar
10 votes
1 answer
371 views

Defining my own invisible operator

There are some invisible operators in Mathematica (\[ImplicitPlus],\[InvisibleTimes],...
swish's user avatar
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