$\underline{\text{In mathematics, you don't understand things. You just get used to them. - Von Neumann}}$

I'm currently a year $4$ undergraduate student at XJTLU doing my Final Year Project on Sheaf Theory and Schemes. My primary interest is Commutative Algebra. Here are some exercises (with solutions) that I wrote (moderately difficult level): Measure Theory & General Topology & Discrete Mathematics & Complex Analysis

$\boxed{\text{I would like to express my gratitude to many users on Math.SE for their great help.}}$