I think I saw a Möbius band at Riverside Museum in Glasgow (photo taken in Feb 2024). 

This page includes some of my earlier writings during my master's and undergraduate programmes.

• Identifying chirality types of alternating knots (Master's thesis, supervised by Prof. Zhongtao WU) 

• Essay about complete non-compact 3-manifold with non-negative Ricci curvature

• Notes about Existence of Partition of Unity 

• Valid Arrangements for Rubik’s Revenge (4 × 4 × 4 version of Rubik’s Cube) (Undergraduate project, supervised by Prof. Jiu Kang YU) 

The main result is stated in Claim 21, which characterises a valid arrangement of a randomly reassembled Rubik's Revenge.  

CUHK MathGym 

• Proof of chain rule (higher dimensional case) 

• Differentiability implies continuity (higher dimensional case)