Alexander Lemmens

activity

20162018

most citedOn the n-th row of the graded Betti table of an n-dimensional toric variety

6 citations · 6 across the 3 of their papers we have counts for

collaborators

Showing 2018Show all

3 papers · 1 filter

math.CO2018

Convexity of distinct sum sets

Alexander Lemmens

We study a combinatorial notion where given a set of lattice points one takes the set of all sums of subsets of a fixed size, and we ask if the given set comes from a convex lattic…

math.AT2018

A local Jordan-Brouwer separation theorem

Alexander Lemmens

We intoduce a local version of the Jordan-Brouwer separation theorem and deduce some global statements, some of which may follow from known results, but the technique is new.

math.AG2018

On syzygies of Segre embeddings of $P^{1} \times P^{1}$

Alexander Lemmens

We construct a nonminimal graded free resolution of Segre embeddings of $P^{1} \times P^{1}$ , although we don't compute all maps. We use this to prove an explicit formula for certain no…

Convexity of distinct sum sets

A local Jordan-Brouwer separation theorem

On syzygies of Segre embeddings of P1×P1

On syzygies of Segre embeddings of $P^{1} \times P^{1}$