Heterogeneity in behaviour and movement can influence the stability of predator - prey periodic travelling waves (2022) Renato Andrade and Christina A Cobbold.
  
Mathematica 11 notebook for computation and evaluation of omega1 according to the procedure described by J.A. Sherratt, X. Lambin, T.N. Sherratt: The effects of the size and shape of landscape features on the formation of travelling waves in cyclic populations. Am. Nat. 162, 503-513 (2003).

Select parameters (eta, beta) on the "Set the fixed parameters" section. Select the range and grid size for E1 and B1 on the Section 4.

To run the notebook, open file on Mathematica 11 software and use command for "Evaluate notebook" or run the cells sequentially.