Chiming in to join the chorus of praise for Permutation City and also call attention to Egan’s technical notes / FAQ for the same. Really mind-bending reading

Chiming in to join the chorus of praise for Permutation City and also call attention to Egan’s technical notes / FAQ for the same. Really mind-bending reading https://www.gregegan.net/PERMUTATION/FAQ/FAQ.html https://www.gregegan.net/PERMUTATION/FAQ/FAQ.html