Geodesic
On the suspension homomorphism
Bollettino della Unione matematica italiana, Série 8, 5B (2002) no. 1, pp. 247-257.

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In this paper we investigate the conditions for the suspension homomorphism $$s \colon \Theta^{\mathcal{F}}_{r-1}(S^{n-1}, x_{0}) \to \Theta ^{\mathcal{F}}_{r}(S^{n}, x_{0})$$ is onto or an isomorphism.
In questa nota vengono studiate le condizioni affinché l'omomorfismo di sospensione $$s \colon \Theta^{\mathcal{F}}_{r-1}(S^{n-1}, x_{0}) \to \Theta ^{\mathcal{F}}_{r}(S^{n}, x_{0})$$ sia un epimorfismo o un isomorfismo. 
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Dragotti, S.; Magro, G.; Parlato, L. On the suspension homomorphism. Bollettino della Unione matematica italiana, Série 8, 5B (2002) no. 1, pp. 247-257. http://geodesic.mathdoc.fr/item/BUMI_2002_8_5B_1_a12/

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