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September 4th, 2011, 05:44 PM   #1
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question on graphs - cycles

hi,
if i have graph (G), and i know that it's minimal cycle length is 5, and the minimal degree in that graph is at least K.
prove that G has at least K^2+1 vertices..

i tried to figure it out but without any success so far

thank you very much !!!
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