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An asymptotic expansion for the discrete harmonic potential

   
@article{EJP170,
	author = {Gady Kozma and Ehud Schreiber},
	title = {An asymptotic expansion for the discrete harmonic potential},
	journal = {Electron. J. Probab.},
	fjournal = {Electronic Journal of Probability},
	volume = {9},
	year = {2004},
	keywords = {},
	abstract = {We give two algorithms that allow to get arbitrary precision asymptotics for the harmonic potential of a random walk.},
	pages = {no. 1, 1-17},
	issn = {1083-6489},
	doi = {10.1214/EJP.v9-170},    
        url = {http://ejp.ejpecp.org/article/view/170}}