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cs.CG2019
A note on minimal art galleries
Eryk Lipka
We will consider some extensions of the polygonal art gallery problem. In a recent paper Morrison has shown the smallest (9 sides) example of an art gallery that cannot be observed…
math.CO2019
Further improving of upper bound on a geometric Ramsey problem
Eryk Lipka
We consider following geometric Ramsey problem: find the least dimension such that for any 2-coloring of edges of complete graph on the points there exists 4-vert…