%0 Journal Article %T Largest Laplacian Eigenvalue and Degree Sequences of Trees %A Tuerker Biyikoglu %A Marc Hellmuth %A Josef Leydold %J Mathematics %D 2008 %I arXiv %X We investigate the structure of trees that have greatest maximum eigenvalue among all trees with a given degree sequence. We show that in such an extremal tree the degree sequence is non-increasing with respect to an ordering of the vertices that is obtained by breadth-first search. This structure is uniquely determined up to isomorphism. We also show that the maximum eigenvalue in such classes of trees is strictly monotone with respect to majorization. %U http://arxiv.org/abs/0804.2776v1