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  1. Home > Articles & Issues >
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  3. How often do we reje ...
Conference paper

How often do we reject a superior value? (Extended abstract)

Kamilla Oliver (1), Helmut Prodinger (2) (3)
(1) Department Mathematik [Erlangen]
(2) Department of Mathematical Sciences [Matieland, Stellenbosch Uni.]
(3) Department of Mathematical Sciences [Stellenbosch University]
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Imported on
January 31, 2017
Published on
December 31, 2010
Last modified on
March 31, 2025
Volume
DMTCS Proceedings vol. AO, 23rd International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2011)
Proceedings
DOI
10.46298/dmtcs.2949
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https://about.hal.science/hal-authorisation-v1
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How often do we reject a superior value? (Extended abstract)

Kamilla Oliver (1), Helmut Prodinger (2) (3)
(1) Department Mathematik [Erlangen]
(2) Department of Mathematical Sciences [Matieland, Stellenbosch Uni.]
(3) Department of Mathematical Sciences [Stellenbosch University]
Abstract
English
Words $a_1 a_2 \ldots a_n$ with independent letters $a_k$ taken from the set of natural numbers, and a weight (probability) attached via the geometric distribution $pq^{i-1}(p+q=1)$ are considered. A consecutive record (motivated by the analysis of a skip list structure) can only advance from $k$ to $k+1$, thus ignoring perhaps some larger (=superior) values. We investigate the number of these rejected superior values. Further, we study the probability that there is a single consecutive maximum and show that (apart from fluctuations) it tends to a constant.
French
On considère des mots $a_1a_2 \ldots a_n$ formés de lettres à valeurs entières, tirées de façon indépendante avec une distribution géométrique $pq^{i-1}(p+q=1)$. Un record $k+1$ est dit consécutif si la lettre précédente est $k$. La notion est motivée par des considérations algorithmiques. Les autres records sont rejetés. Nous étudions le nombre de records rejetés. Nous étudions aussi la probabilité qu'il y ait un seul maximum consécutif, et montrons qu'elle converge vers une constante, à certaines fluctuations près.
Keywords
  • [MATH.MATH-CO]Mathematics [math]/Combinatorics [math.CO]
  • [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM]
  • combinatorics on words
  • records
  • generating functions
  • Rice's method
  • $q$-series
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