1 http://hdl.handle.net/10338.dmlcz/116910 1 News and Notices. Conference EQUADIFF 7 http://hdl.handle.net/10338.dmlcz/102369 News and Notices. Conference EQUADIFF 7 Mon, 09 Jun 2008 15:32:02 GMT An anniversary. [Jindřich Nečas] http://hdl.handle.net/10338.dmlcz/102368 An anniversary. [Jindřich Nečas] Mon, 09 Jun 2008 15:31:57 GMT Existence of prime ideals and ultrafilters in partially ordered sets http://hdl.handle.net/10338.dmlcz/102367 Existence of prime ideals and ultrafilters in partially ordered sets Mon, 09 Jun 2008 15:31:53 GMT On complete $\alpha$-ideals in semigroups http://hdl.handle.net/10338.dmlcz/102366 On complete $\alpha$-ideals in semigroups Mon, 09 Jun 2008 15:31:48 GMT