1993 | OriginalPaper | Buchkapitel
The Fourth Week: The fundamental group of a surface
verfasst von : Michio Kuga
Erschienen in: Galois’ Dream: Group Theory and Differential Equations
Verlag: Birkhäuser Boston
Enthalten in: Professional Book Archive
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The scene of today’s lecture is set in a region in a plane. We define a region to be a part of a plane surrounded by some closed curves. For example, the portion D in Figure 4.1 surrounded by the closed curves C1, C2, and C3 is a region (i.e., the unshaded part of the figure). Figure 4.1