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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: 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 generalized B\'ezout theorem on matrices Plemelj formulas characteristic values and vectors (of a matrix) Harnack theorem oscillation of a function arithmetic-geometric series (see full list)

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