This record contains the code needed to reproduce the main results of the paper Non-reciprocal phase transitions, Michel Fruchart, Ryo Hanai, Peter B. Littlewood, Vincenzo Vitelli, Nature (2021) [ doi:10.1038/s41586-021-03375-9 ] [ arXiv:2003.13176 ] The scripts use Mathematica (Mathematica 12.2.0, WolframScript 1.5.0), Julia (version 1.5.0), and Python (version 3.8.8). Some of the numerical simulations are performed using Dedalus (version 2.1810 ; https://dedalus-project.org). All code is released under the 2-clause BSD license (see LICENSE), except the file complex_derivative.wl (CC BY-SA 4.0, see details in the file). Below, we give a list of the files corresponding to each figure. Main text Fig. 1: - ab: nothing - cd: vicsek/* [ plot: same directory ] - ef: nothing - ghi: nothing Fig. 2: - abc: compute_phase_diagram.wl and analytical_phase_boundaries.wl [ plot: figure_phase_diagram.ipynb ] - de: nothing - fg: compute_spectrogram.wl [ plot: figure_frequencies_steady_state.ipynb ] Fig. 3: - a: compute_chiral_stability_diagram.wl [ plot: figure_stability_diagram_with_chiral.ipynb ] - b: nothing - c: growth_rate_momentum_space.wl [ plot: figure_growth_rate_kspace.ipynb ] - def: dedalus_cluster/* [ plot: figure_movie_patterns_data_analysis_dedalus.ipynb ] Fig. 4: nothing Methods EDF1: nothing EDF2: kuramoto_sqrtn/* [ plot: figure_kuramoto_sqrtN.ipynb ] EDF3: nothing EDF4: kuramoto_ao_Lop.nb [ plot: figure_kuramoto_phase_diagram.ipynb ] EDF5: kuramoto_ao_hysteresis.nb [ plot: figure_kuramoto_hysteresis.ipynb ] EDF6: coupled_swift_hohenberg.py [ plot: figure_coupled_sh.ipynb ] EDF7: parity_breaking_fingering.nb [ plot: figure_si_exceptional_point_jacobian_fingering.ipynb ] SI S1: nothing S2: same as main Fig. 1cd S3: nothing S4: generalized_system_phase_diagram.wl [ plot: figure_si_effect_perturbations_O2.ipynb ] S5: nothing S6: nothing S7: flocking_aligned_chiral_growth_rate_si_fig_data.wl [ plot: figure_growth_rate_chiral_transition.ipynb ] S8: swap_transition_growth_rates.wl [ plot: figure_si_growth_rate_swap_transition.ipynb ] S9: simplified_bifurcation_diagram_compute_data.nb [ plot: figures_si_bifurcation_diagram.ipynb ] S10: same as S7 S11: kuramoto_comparison_mean_field/* [ plot: same directory ] S12: same as EDF2 S13: same as S11 S14: nothing S15: dynamical_system_3D_O3.nb [ plot: figure_si_EP_O3.ipynb ] S16: laser_ep.nb [ plot: figure_si_EP_laser.ipynb ] S17: nothing S18: same as main Fig. 3def S19: linear_stability_hydro_simus.wl [ plot: figure_si_linear_stability_hydro_simus.ipynb ]