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Lotka-Volterramodellen - Home Page of Lars Holm Jensen

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70 KAPITEL 5. STABILITET<br />

x(0)<br />

Ð×ÒÒ×ÙÖÚÒ x(t)<br />

Figur 5.1: Illustration af et stabilt ligevægtspunkt x ∗ .<br />

Figur 5.2 viser et asymptotisk stabilt ligevægtspunkt x ∗ .<br />

x(0)<br />

x ∗<br />

O1<br />

Ä×ÒÒ×ÙÖÚÒ x(t)<br />

Figur 5.2: Illustration af et asymptotisk stabilt ligevægtspunkt x ∗ .<br />

P˚a figur 5.3 vises et ustabilt ligevægtspunkt x ∗ .<br />

x(0)<br />

x ∗<br />

O1<br />

Ð×ÒÒ×ÙÖÚÒ x(t)<br />

Figur 5.3: Illustration af et ustabilt ligevægtspunkt x ∗ .<br />

x ∗<br />

O1<br />

O<br />

O<br />

O

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