- Escher
- Jet space
- Systolic geometry
- Symplectic geometry
- On constructive mathematics
- On musical scales
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May 22 2020: A pocket dictionary of infinities (repost of my 2016-06-09 post on google+)
- Jan 27 2020: Video lecture review: Tom Leinster on operads and entropy
- Dec 29 2019: Cohomology for kids part 2: computing homology
- Dec 24 2019: Cohomology for kids part 1: introduction
Robert's Mistakes