let $S$ be the d-sphere. we know that $S \wedge X = \Sigma^d X$ the $d$-fold suspension of $X$. what can we say about $(S\times S) \wedge (S\times S)$ in terms of suspension?
1 Answer
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That space it not a suspension. For instance, it has nontrivial products in its cohomology, unlike suspensions. If you suspend your space once, it falls apart as a wedge of various spheres of dimensions d and 2d.