Department of Computer Science | Institute of Theoretical Computer Science | CADMO

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar Talk Information |

**Date and Time**: Tuesday, February 03, 2004, 12:15 pm

**Duration**: This information is not available in the database

**Location**: This information is not available in the database

**Speaker**: Sandra Roost

In his paper "Seventeen lines and one-hundred-and-one points", Woeginger describes a
simple a polynomial-time algorithm to find the solution of the following curious
problem:
"Given two positive integers S and Q, does there exist a sequence of positive integers
that add up to S and whose squares add up to Q?"
Along with this problem, he presents a second one about arranging m lines in the
Euclidean plane in a way that there are exactly n points of intersection.

In this talk, I present the two problems, their connection, the algorithm along with its
analysis and the outlook to other problems.

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