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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 699<br />

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✫<br />

“Intuicija”<br />

Izrek (SIM). V druˇzbi ˇsestih ljudi obstaja trojica v kateri se<br />

vsaka dva poznata ali pa vsaka dva ne poznata.<br />

– naivni prostop: preverimo 2 15 = 32.768 moˇznosti,<br />

– barvanje povezav polnega grafa K6 in Dirichletov princip.<br />

Nekaj teˇzja naloga<br />

V druˇzbi 17ih znanstvenikov se vsaka dva dopisujeta o eni izmed treh tem.<br />

Dokaˇzi, da obstajajo trije, ki se dopisujejo o isti temi!<br />

Univerza v Ljubljani ▲<br />

❙ ▲<br />

▲<br />

▲<br />

● ❙ ▲<br />

▲<br />

☛ ✖<br />

✩<br />

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