Timeline for Homotopy groups of $S^2$

11 events

when toggle format	what		by	license	comment
Mar 15, 2019 at 17:35	comment	added	Aleksandar Milivojević		In Griffiths-Morgan "Rational homotopy theory and differential forms" 1981, it is written in Ch.7 that "it is an amazing result of E. Curtis that $\pi_i(S^2) \neq 0$ for all $i\geq 2$." I guess this is a misattribution, since Curtis in his 1969 paper "Some nonzero homotopy groups of spheres" proved the statement for $i \neq 1$ mod 8 (as mentioned in the Ivanov--Mikhailov--Wu paper).
Jan 19, 2016 at 7:21	vote	accept	Roberto Frigerio
Aug 19, 2015 at 0:56	comment	added	David Roberts♦		I edited to give a) a human readable identification of the paper and b) a link to the abstract page instead of the pdf.
Aug 19, 2015 at 0:55	history	edited	David Roberts♦	CC BY-SA 3.0	Made link to abstract page, included paper title for ease of identification
Aug 18, 2015 at 18:12	history	edited	Ripan Saha	CC BY-SA 3.0	added 15 characters in body
Aug 17, 2015 at 17:03	history	edited	Ripan Saha	CC BY-SA 3.0	added 14 characters in body
Aug 8, 2015 at 17:41	comment	added	Ripan Saha		@JeremyRickard yes,that was a typo...thank you for the correction...
Aug 8, 2015 at 15:57	comment	added	Jeremy Rickard		I'm pretty sure you meant $S^2$ rather than $S^n$ and have edited accordingly. Change it back if I've misunderstood.
Aug 8, 2015 at 15:56	history	edited	Jeremy Rickard	CC BY-SA 3.0	changed n to 2
Aug 8, 2015 at 15:36	review	First posts
Aug 8, 2015 at 16:36
Aug 8, 2015 at 15:27	history	answered	Ripan Saha	CC BY-SA 3.0