The Great Icosahedron

201 · John Carlos Baez · May 27, 2026, 8:09 a.m.
mathematics icosahedron Galois group Rational Numbers Geometry
Summary
John Carlos Baez explores the properties of the great icosahedron and its relationship with the field of rational numbers augmented by the square root of 5, highlighting its geometric transformations through the Galois group.
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