Professor in Mathematics
School of Mathematical Sciences
Email: wjiajun AT pku DOT edu DOT cn
In Spring 2023, I am teaching Geometry
- Here is a proof that 1=0.
- Here is the "Laws of Herman" and the amendments.
- "quadrisecant" is a Mathematica program to compute the quadrisecants of a polygonal knot.
- "HFhat" computes the hat Heegaard Floer homology for a closed orientable three-manifold and the hat knot Floer homology of a null homologous knot in a closed orientable three-manifold.
Here are links to my collection of papers,
chess games. And here is the Deep side.