that's me in 1940 and 85 years later

Herman SERRAS Clifford Research Group Faculty of Engineering and Architecture Ghent University Ghent (Belgium)

CLICK HERE if you want to read something about this nesting of the five Platonic solids.

My own pages:

• Golden section - Golden Triangle - Pentagon and Pentagram - Dodecahedron   (update: november 2025)
• The Platonic polyhedra inscribed in a sphere or a cube
• More about the dodecahedron and icosahedron
• A nice combination of the five Platonic solids   (update: november 2025)
• The four regular non-convex polyhedra (Kepler-Poinsot)
• Pythagoras' theorem: a proof bij rearrangement
• The quadratrix: trisection of an angle and squaring the circle
• Mathematics on the "Ritratto di Frà Luca Pacioli"
• Smoothly rolling polygonal wheels
• Elliptical billiard tables
• Barth sextic and decic surface
• "Vis-à-vis": a nice algebraic surface
• Kummer surfaces
• How impossible is Penrose's tribar?
• Hipparchus, Mercator and Mathematical Analysis (in Dutch)
• Apparent daily movement of the sun (in Dutch)