Boundary Value Problems 
Volume 2007 (2007), Article ID 42548, 5 pages
doi:10.1155/2007/42548
Editorial

Harnack's Estimates: Positivity and Local Behavior of Degenerate and Singular Parabolic Equations

Emmanuele DiBenedetto,1 Ugo Gianazza,2 Mikhail Safonov,3 José Miguel Urbano,4 and Vincenzo Vespri5

 1Department of Mathematics, Vanderbilt University, 1326 Stevenson Center, Nashville 37240, TN, USA
2Dipartimento di Matematica “F. Casorati”, Università di Pavia, Via Ferrata 1, Pavia 27100, Italy
3School of Mathematics, University of Minnesota, 231 Vincent Hall, Minneapolis 55455, MN, USA
4Departamento de Matemática, Universidade de Coimbra, Coimbra 3001-454, Portugal
5Dipartimento di Matematica “U. Dini”, Università di Firenze, Viale Morgagni 67/A, Firenze 50134, Italy
Received 20 November 2006; Accepted 28 November 2006

Abstract

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