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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 709<br />

✬<br />

Erdöseva probabilistična metoda (1947)<br />

34 točk določa 561 premic. Da se to zgodi v eni barvi, je verjetnost<br />

✫<br />

2 −561 ≈ 2, 6 · 10 −169 .<br />

Velja tudi 1.000.000<br />

165<br />

34 = 3, 4 · 10 . Torej lahko pričakujemo<br />

6 10<br />

= 3, 4 · 10<br />

34<br />

165 ≈ 0, 01<br />

oziroma 0, 01% enobarvnih.<br />

To pomeni, da v 99, 9% ne dobimo enobarvnega K34.<br />

Slednjo idejo pretvorimo v Erdösev dokaz....<br />

Univerza v Ljubljani ▲<br />

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● ❙ ▲<br />

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☛ ✖<br />

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✩<br />

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