Brun sieve
In mathematics, especially in real algebraic geometry, a semialgebraic space is a space which is locally isomorphic to a semialgebraic set.
Definition
Let U be an open subset of Rn for some n. A semialgebraic function on U is defined to be a continuous real-valued function on U whose restriction to any semialgebraic set contained in U has a graph which is a semialgebraic subset of the product space Rn×R. This endows Rn with a sheaf of semialgebraic functions.
(For example, any polynomial mapping between semialgebraic sets is a semialgebraic function, as is the maximum of two semialgebraic functions.)
A semialgebraic space is a locally ringed space which is locally isomorphic to Rn with its sheaf of semialgebraic functions.
See also
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You can also get your own dedicated server if this is something you such as to have.
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1 Objection of HostGator.
I had to call HostGator to validate my account upon opening it. This didn't take long, however it was an extra step. I would have chosen simply to sign up and get going without needing to call them for confirmation.