A lower bound for area of compact singular surfaces of nonpositive curvature
Bull. Korean Math. Soc. 2007 Vol. 44, No. 1, 103-108 Printed March 1, 2007
Young Do Chai and Doohann Lee Sungkyunkwan University, Sungkyunkwan University
Abstract : In this paper, we obtain some lower bounds for area of nonsimply connected compact singular surfaces of nonpositive curvature. One inequality involves systole and area of the surface.
