Warmest thanks to Mark Bun and Justin Thaler for their terri c article, \Approximate Degree in Classical and Quantum Computing." And, amazingly, they made the time to craft it during a time of worldwide pandemic|wow!
Introduction to Complexity Theory Column 123We close off 2024 with a fantastic guest column by Stacey Jeffery, on the surprising intricacies regarding composition of quantum algorithms.Stacey also did great work in providing illuminating intuitive explanations and figures, so trust me -you don't want to miss it!What's in store for 2025?We expect to publish guest columns by Igor Carboni Oliveira (on Meta-Mathematics of Computational Complexity Theory), Noam Mazor (topic TBA), Elena Grigorescu (on Locally Decodable Codes for Insertions and Deletions) and Mitali Bafna (on Highdimensional expanders and their applications to PCPs and codes), so stay tuned!
Dear Readers, After a short hiatus, the complexity theory column is back with a double feature! In this issue, we present a column by Mitali Bafna on Size-Efficient PCPs from High-Dimensional Expanders, and a column by Fernando Granha Jeronimo, Itai Leigh and Pei Wu on the landscape of complexity classes surrounding QMA(2). Both columns are excellent, and I am sure you will find them both enjoyable and enlightening. Many thanks to the authors for their hard work! What's coming up next in the pipeline? If all goes according to plan, we will feature guest columns by Geoffroy Couteau; Jesse Goodman (on seedless extractors); Davi Castro-Silva, Arkopal Dutt, and Tom Gur (on connections between additive combinatorics and quantum complexity theory); Debarati Das; and Jeroen Zuiddam (on matrix multiplication, moment polytopes and asymptotic spectra). Stay tuned for upcoming issues of SIGACT News!