Christmas is just around the corner and I haven't bought all the gifts for my family yet ( yeah, 😢) My Dad has a PhD in Mathematics, he works in Graph theory and his thesis was about Quasiperiodic tilings. What do you think would make a good gift for him? I'll appreciate anything you could think of! Thanks for reading, hope you have a great day 🙂.
p.s.: after reading all the tags in this website I think this is the right one for this kind of question? please correct me if I'm wrong!