Mathematica, Python, and Julia code associated with the paper "Symplectic decomposition from submatrix determinants" by Jason L. Pereira, Leonardo Banchi, and Stefano Pirandola. Published as Proc. R. Soc. A. 477, 20210513 (2021). See also https://arxiv.org/abs/2108.05364

"Constructing the symplectic basis.nb" contains a Mathematica implementation of the algorithm, as well as several examples of its use.

"symplectic.jl" contains a Julia implementation of the algorithm and "Test.ipynb" is a demonstration of how to use the implementation.

"symplectic_decomposition.py" contains a Python implementation of the algorithm and a demonstration of how to use it.