No label defined (Q4001509)
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scientific article
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | No label defined |
scientific article |
Statements
18 September 1992
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fundamental group
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coverings
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singular homology surfaces
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knots
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Wirtinger presentation
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Brouwer fixed point theorem
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Seifert-van Kampen theorem
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