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math.CO2018
The unavoidable arrangements of pseudocircles
Carolina Medina, Jorge Ramírez-Alfonsín, Gelasio Salazar
It is known that cyclic arrangements are the only {\em unavoidable} simple arrangements of pseudolines: for each fixed , every sufficiently large simple arrangement of pseu…
math.CO2017★ 1 cited
On the number of unknot diagrams
Carolina Medina, Jorge Ramírez-Alfonsín, Gelasio Salazar
Let be a knot diagram, and let denote the set of diagrams that can be obtained from by crossing exchanges. If has crossings, then cons…