Mr. Kostas Sotiropoulos, my PhD advisee, has successfully defended his thesis “Methods, Algorithms and Impossibility Results for Machine Learning on Graphs”. Defending a PhD thesis requires extensive research, critical thinking, and the ability to present and defend one’s ideas in front of a committee of experts. It is an impressive accomplishment that demonstrates Mr. Sotiropoulos’s […]

Il Cattedrale di Santa Maria del Fiore in Florence is a masterpiece church. I read a story in John Kay’s book Obliquity [1] about the history of the dome that I find worth sharing with you here in case you don’t already know it. Filippo Brunelleschi was one of the architects competing for the commision […]

In CS131, we see the “Proof from the Book” due to Euclide that the number of prime numbers is infinite. Here is another favorite proof that is based on elementary facts. Suppose that is a list of all the primes. From what we have learnt about the  sum of geometric progressions we know that for […]