3 http://hdl.handle.net/10338.dmlcz/119665 3 A categorical account of the localic closed subgroup theorem http://hdl.handle.net/10338.dmlcz/119678 A categorical account of the localic closed subgroup theorem Tanaka spaces and products of sequential spaces http://hdl.handle.net/10338.dmlcz/119677 Tanaka spaces and products of sequential spaces On non-normality points and metrizable crowded spaces http://hdl.handle.net/10338.dmlcz/119676 On non-normality points and metrizable crowded spaces Functions that map cozerosets to cozerosets http://hdl.handle.net/10338.dmlcz/119675 Functions that map cozerosets to cozerosets