Let I=(x,y2). Because k[x,y] is a Cohen-Macaulay ring, we have that gradeI=heightI (this is corollary 2.1.4 in Bruns and Herzog, Cohen-Macaulay Rings). ... <看更多>

All rings will be commutative (strictly speaking this is not necessary, but we will take algebraic geometry as main motivation) and unital. ... <看更多>

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Is it possible to give a 2D primitive like Ring thickness/depth? I'm trying to make a 3D door with primitives and I want to make either a ... ... <看更多>