hsfzLZH1's Homepage
2026
- A translational tile that cannot repeat periodically in three dimensions
- Why ten smaller pieces may not cover a set in nine dimensions
- Why five colors would not suffice for the Euclidean plane
- How long can a coloring avoid a long arithmetic progression
- Graph coloring and clique minors after the coefficient-one conjectures
- When a bipartite pattern is rarer than the random-graph benchmark
- Arithmetic progressions from a divergent reciprocal sum
- Intersecting hypergraphs that need one more covering vertex
- One color for every finite subset sum and product
- Exact crossing counts for complete and complete bipartite graphs