Freudenthal Suspension Theorem

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Freudenthal Suspension Theorem

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If \(X\) is an \(n{\hbox{-}}\) connected CW complex, then there are maps \(\pi_i X \to \pi_{i+1} \Sigma X\) which is an isomorphism for \(i\leq 2n\) and a surjection for \(i=2n+1\).

Examples

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