1 2 3 4 6 9 9 Publication 15 a Cat Form

Instructions and help about 1 2 3 4 6 9 9 Publication 15 A Cat

hi the question that we are going to solve now is called one of the classic cat question but this is a adores number question is from cat 2006 paper so let me briefly explain about this question a mathematician named Paul Erdos how bothered more than 1500 papers so most of the papers have written along with other people but he has published very less papers by himself so humorously the n adores number will be attached to these mathematicians for example Paul Erdos himself has got an elders number of zero so suppose if a mathematician has written a paper let us say his name is yay he has written a paper along with Paul Erdos he'll be assigned a value of one if any other person who has written a paper with yay he'll be given any reduced number of two for example if another person let us say Y of Willoughby did so you have got the reduced number of six already probably has written already a paper get five so he has got six now if a and F together how written a paper together so your value