Top network posts

• 33 What is a blow-up?
• 25 Example of an algebra which is not a σ-algebra.
• 21 Spectrum of $\mathbb{Z}[x]$
• 19 Irreducible components of the variety $V(X^2+Y^2-1,X^2-Z^2-1)\subset \mathbb{C}^3.$
• 17 A maximal ideal is always a prime ideal?
• 16 Triangle inequality for subtraction?
• 14 How are $\operatorname{Spec} \mathbb{Q}, \operatorname{Spec}\mathbb{R}, \operatorname{Spec}\mathbb{C}$ etc different?
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