Recent and upcoming talks by Yinhe Peng

Yinhe Peng: Basis of Countryman lines

Place: Fields Institute (Room 210) Date: July 13 , 2018 (13:30-15:00) Speaker: Title: Basis of Countryman lines Abstract: U. Abraham and S. Shelah proved that it is consistent to have a 2 element basis for Countryman lines. continue reading…

Yinhe Peng: PFA implies a class of hereditarily Lindelof spaces are D spaces

Place: Fields Institute (Room 210) Date: September 22, 2017 (13:30-15:00) Speaker: Yinhe Peng Title: PFA implies a class of hereditarily Lindelof spaces are D spaces Abstract: For a space X, OSM_X asserts that for any open neighbourhood assignment (or open set mapping) N, there is a partition of X into countably many pieces such that for each x, y in the same piece, either x is in N(y) or y is in N(x). continue reading…