Calculating the homology of Poincaré’s homology sphere through dodecahedron and cellular homology
The H+ doner and acceptor analogy in universal coefficient theorem for homology
Most hilarious exercise I have seen so far
The double dual trick to construct a better object from the existing one
Playful observations with deformation retracts and path connected-ness
Amazed by how ring theory can be linked up to topology
The true talent is the ability to carry on
A more intuitive explanation of Burnside’s lemma
An elementary solution of a weird intergal problem (Putnam 1985 A5)
[Updated 20250408]RISC-V explainer
[Updated 20250331]Centrality: how we actually perceive the severity of a bug
Picking grammatical mistakes in an insightful article
Our legal (and moral) system flavors the jerks
Why use binary search when you can guess where it should be
Work at the level of abstraction that works for you
Relaxation is the result of mastery. With thoughts about problem solving
Reinventing Catalan numbers
From casual description of Turing Machine to the density of uncomputable functions
Why do I hate using chatGPT to replace search engines
Unity Game Reversing(1): Setup