On non-optimally expanding sets in Grassmann graphs. (English) Zbl 1429.68077
Diakonikolas, Ilias (ed.) et al., Proceedings of the 50th annual ACM SIGACT symposium on theory of computing, STOC ’18, Los Angeles, CA, USA, June 25–29, 2018. New York, NY: Association for Computing Machinery (ACM). 940-951 (2018).