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 October 12th, 2018, 07:24 AM #1 Newbie   Joined: Jul 2018 From: morocco Posts: 26 Thanks: 0 Math Focus: algebraic number theory What is a Rational prime? Hello When we say let $p$ be rational prime, automatically that does mean that p>0?? thanks
 October 12th, 2018, 09:12 AM #2 Senior Member   Joined: Aug 2017 From: United Kingdom Posts: 313 Thanks: 112 Math Focus: Number Theory, Algebraic Geometry Normally I'd answer a question like this by saying, "It depends on the author." But, looking through my books, it seems people usually don't bother specifying. I guess this is because it very rarely actually matters whether $p$ is positive, and, on the odd occasion that it does matter, it's usually obvious from the context what is meant. Thanks from Chems

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