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

Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Thursday, December 01, 2011, 12:15 pm

Duration: 45 minutes

Location: CAB G51

Speaker: Isabelle Hurbain-Palatin

Sorting by placement and shift

This paper by Sergi Elizalde and Peter Winkler analyses "homing", a sorting algorithm motivated by the hand-sorting of files. Elements are placed in their proper positions; the sorting is done "in place" by shifting the necessary elements.
Considering the number of steps involved, the following results are proved:
- the best case is fast,
- the worst case is very slow (but the algorithm always terminates),
- there is a super-exponential number of worst cases.


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