Geodesic
Logarithmic potential $\beta$-ensembles and Feynman graphs
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Problems of modern theoretical and mathematical physics: Gauge theories and superstrings, Tome 272 (2011), pp. 65-83

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We present a diagrammatic technique for calculating the free energy of the matrix eigenvalue model (the model with an arbitrary power of the Vandermonde determinant) to all orders of the $1/N$ expansion in the case when the limiting eigenvalue distribution spans an arbitrary (but fixed) number of disjoint intervals (curves) and when logarithmic terms are present. This diagrammatic technique is corrected and refined as compared to our first paper with B. Eynard of 2006. 
@article{TM_2011_272_a6,
     author = {L. O. Chekhov},
     title = {Logarithmic potential $\beta$-ensembles and {Feynman} graphs},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {65--83},
     publisher = {mathdoc},
     volume = {272},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2011_272_a6/}
}
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L. O. Chekhov. Logarithmic potential $\beta$-ensembles and Feynman graphs. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Problems of modern theoretical and mathematical physics: Gauge theories and superstrings, Tome 272 (2011), pp. 65-83. http://geodesic.mathdoc.fr/item/TM_2011_272_a6/