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# Buddy list for perucho

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Members: bbukh Algeboy drini mathcam akrowne Henry CWoo djao perucho pahio (see full roster)Content: Schwarz and Poisson formulas phase parametrization in $\cos(x+p)=\cos x$ sequences $b^{2n}-1$ and $b^{2n-1}+1$ are divisible by $b+1$ connection between Riccati equation and Airy functions Euler's equation for rigid bodies representation of real numbers particle moving on the astroid at constant frequency spiral motion of a particle particle moving on a cardioid at constant frequency time dilatation of a volume element harmonic oscillator topics on vectors vibrating string second order tensor: symmetric and skew-symmetric parts vibrating string with variable density motion of continuum Hankel contour integral continuity equation proof of Abel lemma (by expansion) Reynolds transport theorem (see full list)

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