This is a Mathematica notebook created to analyze the replicator dynamics in 3-strategy games under positive and negative selective assortment. To run this notebook, you may use the free Wolfram Player or Mathematica. Please, download version 13.3 or later. If you use this notebook in a publication, we would appreciate it if you could cite it as: Izquierdo, L.R., Izquierdo, S.S. & Hauert, C. (2024). 3-strategy Replicator Dynamics with Selective Assortment. Software. DOI: 10.5281/zenodo.12763923. Luis R. Izquierdo, Segismundo S. Izquierdo & Christoph Hauert

L.R.I. and S.S.I. gratefully acknowledge financial support from the Spanish State Research Agency (PID2020-118906GB-I00/AEI/10.13039/501100011033), from the Regional Government of Castilla y León and the EU-FEDER program (CLU-2019-04 - BIOECOUVA Unit of Excellence of the University of Valladolid), and from the Spanish Ministry of Universities (PRX22/00064 and PRX22/00065). C.H. acknowledges financial support from Natural Sciences and Engineering Research Council of Canada (NSERC) RGPIN-2021-02608.