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Tag Archives: Algebraic geometry
What is an Infinitesimal?
A guest post from Reginald Anderson at Kansas State University. Firsttime learners of calculus often struggle with the notion of an infinitesimal, and considering $\frac{dy}{dx}$ literally as a fraction can lead students astray in Calculus III and differential equations, when … Continue reading
Posted in Algebraic Geometry, Math Education, Teaching
Tagged Algebraic geometry, Math, Teaching
Comments Off on What is an Infinitesimal?
A Pretty Lemma About Prime Ideals and Products of Ideals
I was trying to prove a theorem in algebraic geometry which basically held if and only if this lemma held. Here’s the lemma: Lemma: Given any ring $A$, a prime ideal $ \mathfrak{p} \subset A$, and a finite collection of ideals … Continue reading