# Welcome to Yu-Shen Lin's Homepage

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**# Teaching at BU

- MA 226: Differential Equations (Spring 2023) <-- Syllabus
First-order linear and separable equations. Second-order equations and first-order systems. Linear equations and linearization. Numerical and qualitative analysis. Laplace transforms. Applications and modeling of real phenomena throughout. (Cannot be taken for credit in addition to CAS MA 231.) Effective Fall 2020, this course fulfills a single unit in the following BU Hub area: Critical Thinking

- MA 564: Introduction to Toplogy (Spring 2023) <-- Syllabus
Introduction to point set and algebraic topology. Topological spaces and continuity. Compactness and connectedness. Metrizable topological spaces. Product topology and Tychonoff's theorem. The fundamental group and van Kampen's theorem. Covering spaces and the universal cover.

- MA 745: Algebraic Geometry (Fall 2022)

- MA 226: Differential Equations (Spring 2022)

- MA 731: Lie Groups and Lie Algebras(Spring 2022)

- MA 225: Multi-Variable Calculus (Fall 2021)

- MA 564: Introduction to Toplogy (Spring 2021)

- MA 225: Multi-Variable Calculus (Fall 2020)

- MA 225: Multi-Variable Calculus (Spring 2020)

- MA 225 Multi-Variable Calculus (Fall 2018)

# Teaching in the Past

- Stanford
- Math 257c: Symplectic Geometry and Topology

- Math 115: Functions of a Real Variables

- Math 53: Ordinary Differential Equations with Linear Algebra

- Math 52: Integration Calculus of Several Variables

- Math 51: Linear Algebra and Differential Calculus of Several Variables

- Harvard
- Math 1b: One-variable Calculus