2 papers
math.CO2025
Excursions in Sylvester-Gallai land
Imre Barany, Julia Q. Du, Dan Schwarz +2
The Sylvester-Gallai theorem states that for a finite set of points in the plane, if every line determined by any two of these points also contains a third, then the set is necessa…
math.CO2023
A matrix version of the Steinitz lemma
Imre Barany
The Steinitz lemma, a classic from 1913, states that , a sequence of vectors in with , can be rearranged so that every partial sum of the rea…