Generalizing Specker's result [7] for a countable case without using the continuum hypothesis, NΓΆbeling [6] proved that the subgroup of a direct product I consisting of all finite valued functions is free for any index set I As a non-commutative version of this theorem in case I is countable, Zastro
The big fundamental group, big Hawaiian earrings, and the big free groups
β Scribed by J.W. Cannon; G.R. Conner
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 184 KB
- Volume
- 106
- Category
- Article
- ISSN
- 0166-8641
No coin nor oath required. For personal study only.
β¦ Synopsis
In this second paper in a series of three we generalize the notions of fundamental group and Hawaiian earring. In the first paper we generalized the notion of free group to that of a big free group. In the current article we generalize the notion of fundamental group by defining the big fundamental group of a topological space. We also describe big Hawaiian earrings, which are generalizations of the classical Hawaiian earring. We then prove that the big fundamental group of a big Hawaiian earring is a big free group.
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