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Showing 2007 · math.ACShow all
2 papers · 2 filters
math.AC2007
The patch topology and the ultrafilter topology on the prime spectrum of a commutative ring
Marco Fontana, K. Alan Loper
Let R be a commutative ring and let Spec(R) denote the collection of prime ideals of R. We define a topology on Spec(R) by using ultrafilters and demonstrate that this topology is…
math.AC2007
Uppers to zero and semistar operations in polynomial rings
Gyu Whan Chang, Marco Fontana
Given a stable semistar operation of finite type on an integral domain , we show that it is possible to define in a canonical way a stable semistar operation of finite t…