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Showing 1 to 1 of 1 for “"THEOREME OF POINCARE-HOPF"”.
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1. ΕΠΙΦΑΝΕΙΕΣ ΜΕ ΙΣΟΜΕΤΡΙΚΕΣ ΣΚΙΟΓΡΑΜΜΕΣ 2. ΕΠΙΦΑΝΕΙΕΣ ΜΕ ΙΣΟΜΕΤΡΙΚΕΣ ΓΕΩΔΑΙΣΙΑΚΕΣ
IN THIS WORK A NEW CHARACTERIZATION OF A 2-DIMENSIONAL SPHERE IN TERMS OF ITS SHADOW-LINES OR GEODESICS, IS GIVEN, CONTAINED IN WHAT WE HEREAFTER CALL THEOREMA AND B. THEOREM A: LET M BE A COMPACT AND STRICTLY CONVEX SURFACE EMBEDDED INTHE EUCLIDEAN SPACE E3 OR IN THE HYPERBOLIC SPACE H3. WE …