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Authors

George Seifert

Document Type

Research

Abstract

Consider an n-cell containing the origin and suppose its boundary Sn-1 has the following property: every point on Sn-l contains a neighborhood in Sn-l such that any ray from the origin intersecting this neighborhood intersects it exactly once. Then it is shown by using the concept of a covering space that any ray from the origin intersects Sn-1 exactly once.

Publication Date

1963

Journal Title

Proceedings of the Iowa Academy of Science

Volume

70

Issue

1

First Page

351

Last Page

353

Copyright

© Copyright 1963 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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