The Case Against Google’s Claims of “Quantum Supremacy”: A Very Short Introduction.

Prologue (Anton Kapustin): Arnold at the gym  A story about the mathematical experience as told by Anton Kapustin (over Facebook): While working out at the gym I was thinking about Kolmogorov-Arnold-Moser theory and whether it has a quantum analog. Suddenly … Continue reading →

Moshe Vardi wrote a short interesting essay “What is theoretical computer science?” (It followed by interesting posts on Facebook.) Moshe argues that Thinking of theoretical computer science (TCS) as a branch of mathematics is harmful to the discipline. I personally … Continue reading →

“Time for Peace” (זמן לשלום), Lyrics: Amnon Abutbul, Yair Dalal, Fathi Kasem; Melody: Amnon Abutbul. Performing Shlomit Aharon and Yevgeni Shapovalov. This year I had the rare event that the new Jewish year coincides with my birthday, and “time for … Continue reading →

There are very many irrational numbers but proving irrationality of a specific number is not a common event. A few weeks ago Frank Calegari, Vesselin Dimitrov, and Yunqing Tang posted a paper that proved the irrationality of  . In fact … Continue reading →

Viterbo conjecture – refuted Claude Viterbo’s 2000 volume-capacity conjecture asserts that the Euclidean (even dimensional) ball maximizes  (every) symplectic capacity  among convex bodies of the same volume. In the recent paper A Counterexample to Viterbo’s Conjecture, Pazit Haim-Kislev and Yaron … Continue reading →