acknak wrote:I'm not enough of a mathematician to understand what you're after, but does this give you anything you can use?

{size *1.5 "∪"} csub{n=1} csup{m} (X_n)

To me it looks like what RonLugge was asking for. I've seen similar requests a few times, and wonder if it might be something for a feature request. If so, what would be the best approach? I see two possibilities:

- Asking for each operator to be included in the predefined Math toolbox.
- Including a new type of user definable operator, the "range operator" (roper?), for the "series" class of operations.

Then again, perhaps this should be a new thread, with a poll. See if we get some suggestions for other approaches here first...

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