Abstract
We will encounter first the Catalan numbers as the number of (oriented) rooted trees. We shall define more precisely this object in the next paragraph. Actually, Catalan numbers count many other combinatorial objects. In a first part, we shall see that they also enumerate non-crossing partitions as well as Dick paths, a fact which we shall use later. As a warm-up to matrix models, we will also state the bijection with planar maps with one star. Then, we will study the Catalan numbers, their generating function, and relate them to the moments of the semicircle law.
Keywords
- Connected Graph
- Spectral Measure
- Rooted Tree
- Catalan Number
- Undirected Edge
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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© 2009 Springer-Verlag Berlin Heidelberg
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Guionnet, A. (2009). Wigner’s theorem. In: Large Random Matrices: Lectures on Macroscopic Asymptotics. Lecture Notes in Mathematics(), vol 1957. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69897-5_2
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DOI: https://doi.org/10.1007/978-3-540-69897-5_2
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Publisher Name: Springer, Berlin, Heidelberg
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Online ISBN: 978-3-540-69897-5
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