4 problems

Let $V$ be a PDGA whose cohomology is connected and simply-connected, and let $\Model_1$ and $\Model_2$ be connected and simply-connected PD models of $V$. A PD model is a Poincaré…

Let $M$ be a simply connected closed $m$-dimensional manifold, let $(A,d)$ be a Poincaré-duality model for $M$, and let $F(M,k)$ be the ordered configuration space of $k$ points in…

Let $X$ have dimension at most $n$, let $Y$ be simply connected, and let $f:X\to Y$ be nullhomotopic with Lipschitz constant at most $L$. Let … be a filtration of the indecomposabl…

Let $(\Lambda V,d)$ be an elliptic Sullivan minimal algebra, so its cohomology and generating graded vector space are finite-dimensional. The algebraic H-conjecture. One has … This…