Set theory (operators)

[Joe Horn]

(10-24-2014 04:26 AM)Alberto Candel Wrote:  I have tried this one also, but, can you do \(A\cap B\), or \(A\cap B\cap C\), with the \(\cap\) symbol between the sets?

I don't think so. If Prime has a built-in facility for defining infix operators, I'd love to know about it.

(10-24-2014 10:39 AM)DrD Wrote:  I considered "Define"-ing Set operations using appropriate notation symbols as well, but it takes something like 11 pages of "Chars" to sort through to get to the needed symbols; hardly worth the effort. It's quicker just typing function keywords!

Well... yes and no. It's much faster if you use the "More" button in the Chars browser. In the above example, tapping "More" and then pressing ALPHA M jumps immediately to the "Math Operators" block, where ∩ and many other goodies can be found. No need to press Page Down repeatedly to get there. Ditto for the other Unicode blocks.

Also, AFTER defining such a function, typing the name is usually NOT faster than using your defined function, because the latter is available in the Toolbox User Functions menu, usually in 3 keystrokes total, no matter what you named your function. For example, right now I can access my ∩ function by pressing Toolbox 2 1. That's 3 keystrokes, whereas INTERSECT() requires 13 if you type it out.