Concepedia

On the Second Relative Homotopy Group of an Adjunction Space: An Exposition of a Theorem of J. H. C. Whitehead

Ronald Brown

Journal of the London Mathematical Society · 1980 · 32 citations · 4 references

DOI

Concepts

References

4

Combinatorial homotopy. I

J. H. C. Whitehead · Bulletin of the American Mathematical Society · 1949 · 848 citations · Full text

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On Adding Relations to Homotopy Groups

J. H. C. Whitehead · Annals of Mathematics · 1941 · 281 citations

, , +11

On the Connection between the Second Relative Homotopy Groups of Some Related Spaces

Ronald Brown, Philip J. Higgins · Proceedings of the London Mathematical Society · 1978 · 146 citations

, , +11

Free and Projective Crossed Modules

John G. Ratcliffe · Journal of the London Mathematical Society · 1980 · 37 citations

, , +4