Spice the Bird
If $X$ is a simplicial complex, is their a characterization of the links of the vertices of $X$ that is equivalent to the statement "$|X|$ is a manifold
asked Dec 13 '12 at 18:19
Is the following invariant of rooted trees a complete invariant?
asked Sep 22 '12 at 20:45
What is the precise relationship between “prodsimplicial sets” and rooted trees?
asked May 23 '12 at 4:14
What is the homotopy type of the space of the homeomorphisms of the n-ball such that the homeomorphism restricted to the boundary is isotopic to the identity?
asked Nov 7 '12 at 5:34
A subcategory of top where subspaces and subobjects coincide?
asked Jun 22 '11 at 20:52
What propositions about sets can be transfered to propositions about a presheaf category?
asked Mar 7 '12 at 2:12
Examples where it's useful to know that a mathematical object belongs to some family of objects
Fundamental problems whose solution seems completely out of reach
Why study simplicial homotopy groups?
When and where did the term “module” enter commutative algebra?
The concept of Duality
Why is the the classifying space of the natural numbers homotopy equivalent to the circle?