Is null homotopic

Add a comment. Active Oldest Votes. Hans Parshall Hans Parshall 5, 3 3 gold badges 22 22 silver badges 29 29 bronze badges. Sign up or log in Sign up using Google.

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Linked Related 5. Sign up to join this community. The best answers are voted up and rise to the top. Maps inducing zero on homotopy groups but are not null-homotopic Ask Question. Asked 11 years, 9 months ago. Active 6 years, 3 months ago. Viewed 5k times. I search the literature a little bit, D. Improve this question. Ying Zhang. Ying Zhang Ying Zhang 1, 9 9 silver badges 15 15 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. I guess it is not very hard to find a space with non trivial Bockstein, e.

Dylan Thurston Dylan Thurston 9, 1 1 gold badge 36 36 silver badges 58 58 bronze badges. Btw, the exercise you mentioned is on Hatcher p. Charles Rezk Charles Rezk