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Lien (Mathematik)

twee Lienen in ehr Koordinatensystem

In de Mathematik is en Lien (f, Mehrtall Lienen) en unendlich langen, unendlich dünnen un graden Bagen. (De Lien is en speziellen Bagen, de nich krumm is.) In de euklidsche Geometrie, is de Lien dör twee Punkten defineert, de op de Lien liggt. De Lien is de körtste Lenk twischen disse Punkten.

Twee oder mehr Punkten, de op desülvige Lien liggt, warrt kollinear nöömt.

In den euklidschen Ruum Rn (un ok in allen annern Vekterrüüm), warrt de Lien L as en Ünnerkoppel vun R in de Form

defineert. a and b sünd hier vörgeven Vekters ut Rn un b is nich liek 0. De Vekter b beschrifft de Richt vun de Lien un a is en Punkt op de Lien. Dat gifft mehr as een Poor vun a un b, de desülvige Lien beschrievt.

In den R2 lett sik de Lien L ok as

schrieven, woneem a, b un c (de nich liek to de 0 ween dörvt) Koeffizienten nöömt warrt.

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Lien (Mathematik)
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