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Good book, but it only say that one should know what goes upright and what doesn't. May be it's not absolute LaTeX related, but I think the question what does LaTeX understands as math operator? is related, and someone can add extra info about what should and what shouldn't be an operator.

Thank ...

My question is about when should I use upright roman \operatorname{blah} or in the whole document with \DeclareMathOperator{\foo}{blah} to 'name' a function.

Here's an example, I hope you can tell me how do you decide what goes upright (as an operator ) and what keeps italic:


$\displaystyle \int ...

Nobody knows?

Hello,

I'm looking how to change just the integral symbol:

The symbol you obtain writing \int with \usepackage[utopia]{mathdesign} instead the original \int symbol (in modern roman).

Thank you very much (and sorry about my English :S )