Corrigendum to “Commutators on $(\sum\ell _q)_p$” (Studia Math. 206 (2011), 175–190)
We give a corrected proof of Theorem 2.10 in our paper “Commutators on $(\sum \ell _q)_p$” [Studia Math. 206 (2011), 175–190] for the case $1< q< p< \infty $. The case when $1=q< p< \infty $ remains open. As a consequence, the Main Theorem and Corollary 2.17 in that paper are only valid for $1< p, q< \infty $.