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In the question

Classifying the irreducible representations of $\mathbb{Z}/p\mathbb{Z}\rtimes \mathbb{Z}/n \mathbb{Z}$

the author is talking about irreducible representations of a semi-direct product. Does he mean representations over $\mathbb{C}, \mathbb{Z}, \mathbb{F}_p, \ldots$? Or would the way to construct them be the same?

I'm not sure if it is allowed to re-ask a question. If not. I'm sorry.

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    guest look up [modular representation theory](http://en.wikipedia.org/wiki/Modular_representation_theory).2012-07-17

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As Jack Schmidt said: "The old answer is talking about $\mathbb C$, though the ideas can be applied more generally."

(It seems this question has been answered in the comments; in order for the question to be marked as answered, I copied the answer above and made this CW.)