03_Vorlesung_18_Okt_2007

03_Vorlesung_18_Okt_2007 - Datenstrukturen Algorithmen VO...

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Algorithmen VO 708.031 3. Vorlesung, am 18.Okt 2007
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18.10.2007 [email protected] 2 Kleine Wiederholung • Mathematische Definition von Komplexitätsklassen • Asymptotische Betrachtungsweise ( n Æ ) O-Notation Æ beschränkt von oben Æ worst case -Notation Æ beschränkt von unten Æ best case Θ -Notation Æ von beiden Seiten beschränkt f(n) = Θ (g(n)) f(n)=O(g(n)) und f(n)= (g(n))
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18.10.2007 [email protected] 3 “Rechen”-Regeln für die O-Notation
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18.10.2007 [email protected] 4 Rekursionen - Analyse bis jetzt schrittweise (iterativ) - aber Algorithmen können auch rekursiv definiert werden - Wie funktioniert die Analyse dann? 1. Aufstellen einer Rekursiongleichung + Abbruchbedingung 2. Lösen der Rekursiongleichung (verschiedene Methoden) - Laufzeiten (rekursiv vs. iterativ) müssen NICHT gleich sein! - Man kann jeden rekursiven Code auch iterativ formulieren
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This note was uploaded on 11/19/2009 for the course HKJLHKJL 565 taught by Professor Fhfh during the Spring '09 term at University of Graz.

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03_Vorlesung_18_Okt_2007 - Datenstrukturen Algorithmen VO...

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