Add symcelmech: open-source Maxima package for analytical celestial mechanics#70
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symcelmech — an open-source Maxima package for analytical celestial mechanics based on Lie transformations (Hori-Deprit method).
8 modules covering potential derivation, orbital averaging (Hansen coefficients), Poisson brackets, Lie series corrections, and planetary equations
Supports both closed-form and eccentricity series expansion modes
Includes regression test suite (rtest_symcelmech.mac, 40/40 passing)
Companion paper: "A Hybrid Symbolic-Numerical Framework for Artificial Satellite Theory and Dynamics using Maxima and Julia" (under review)
Repository: https://github.com/guilhermedeolivpaes/symcelmech