recent posts

TypeTitleAuthorRepliesLast Post
categoryTóth, Csaba D. Anonymous015 years 50 weeks ago
Open problemFrankl's union-closed sets conjecture tchow216 years 6 days ago
categorytotal order Anonymous016 years 1 week ago
categorylinear order Anonymous016 years 1 week ago
categoryfilter bases Anonymous016 years 1 week ago
categorychain Anonymous016 years 1 week ago
Open problemChain-meet-closed sets porton016 years 1 week ago
forum topicSuggestion: Catalog of open problem sites porton016 years 2 weeks ago
Open problemDouble-critical graph conjecture DFR216 years 3 weeks ago
categoryfilters Anonymous016 years 3 weeks ago
Open problemShuffle-Exchange Conjecture Vadim Lioubimov016 years 3 weeks ago
categoryfilters,pseudodifference Anonymous016 years 4 weeks ago
Open problemStrong colorability berger516 years 4 weeks ago
Open problemOn Gersgorin Theorem Miwa Lin316 years 5 weeks ago
categoryedge-cut mdevos016 years 6 weeks ago
categoryalgorithm Anonymous016 years 6 weeks ago
Open problemIs there an algorithm to determine if a triangulated 4-manifold is combinatorially equivalent to the 4-sphere? rybu016 years 6 weeks ago
Open problemWhat is the homotopy type of the group of diffeomorphisms of the 4-sphere? rybu016 years 6 weeks ago
categorydiffeomorphisms Anonymous016 years 6 weeks ago
category3-manifold Anonymous016 years 6 weeks ago
categoryembedding Anonymous016 years 6 weeks ago
category4-sphere Anonymous016 years 6 weeks ago
categoryKirby Anonymous016 years 6 weeks ago
Open problemWhich compact boundaryless 3-manifolds embed smoothly in the 4-sphere? rybu016 years 6 weeks ago
categorysubsets of euclidean space Anonymous016 years 6 weeks ago