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Slika - Shrani.si

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A. Juriˇ<strong>si</strong>ć in V. Batagelj: Verjetnostni račun in statistika 700<br />

✬<br />

Ramseyjevo ˇstevilo r(k, ℓ) je najmanjˇse ˇstevilo<br />

za katerega vsak graf na r(k, ℓ) vozliˇsčih<br />

vsebuje bodi<strong>si</strong> k-kliko bodi<strong>si</strong> ℓ-antikliko.<br />

Prepričaj se, da je r(k, ℓ) = r(ℓ, k).<br />

Primeri:<br />

✫<br />

r(k, 1) = 1 = r(1, ℓ),<br />

r(2, ℓ) = ℓ, r(k, 2) = k,<br />

SIM : r(3, 3) ≤ 6.<br />

Univerza v Ljubljani ▲<br />

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☛ ✖<br />

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✩<br />

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