Structure of the second homotopy group of the union of two spaces

DOI10.1007/BF01086637zbMath0612.55018MaRDI QIDQ1088200

Sergey V. Matveev

Publication date: 1987

Published in: Journal of Soviet Mathematics (Search for Journal in Brave)

zbMATH Keywords

fundamental groupsknots in \({bbfR}^ 4\)triadsvan Kampen theorem for second homotopy group

Mathematics Subject Classification ID

Homotopy groups, general; sets of homotopy classes (55Q05) Homotopy groups of special spaces (55Q52)

Cites Work

• Unnamed Item
• Ribbon concordance of knots in the 3-sphere
• The homotopy groups of knots. I: How to compute the algebraic 2-type
• On adding relations to homotopy groups

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