Notes on various topics, in no particular order:

• Riemannian distances are locally equivalent
• Why Wirtinger derivatives behave so well
• A conceptual proof of the identity vec(ABC) = (A^t⊗C)^t vec(B)
• A proof of Zsigmondy's Theorem
• Continued fractions and Laurent series
• Een introductie tot getaltheorie (Dutch)
• Bewijs van de Stelling van Zsigmondy (Dutch)