On some mathematical topics I found interesting.
Separating Hyperplanes and Applications to Convex Analysis
Determinant: A Geometrical Interpretation
Elementary Theories of Divisible Groups
Divisible groups: Universal Property and Systems of Equations
Cantor-Bendixson rank in group theory: A theorem of B.H. Neumann
Exploring the works of Gilbert Baumslag
Gödel Lost Lettre and P=NP
Geometric Group Theory
Geometry and the Imagination
Here there be dragons
Image des Mathématiques
Low Dimensional Topology
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