. "Baker\u2013Campbell\u2013Hausdorff formula" . . "Hadamard lemma" . . "Baker\u2013Campbell\u2013Hausdorff formula#Infinitesimal case" . "Dynkin's series formula" . "BCH formula" . . "CBH expansion" . . . "BCH expansion" . . . . . . "Baker–Campbell–Hausdorff formula" . . "integral formula" . . . . "Campbell\u2013Baker\u2013Hausdorff formula" . "Baker-Campbell-Hausdorff formula" . . "Baker\u2013Campbell\u2013Hausdorff_formula#The_Zassenhaus_formula" . "An explicit Baker–Campbell–Hausdorff formula" . "Baker\u2013Campbell\u2013Hausdorff formula" . "Baker\u2013Hausdorff expansion" . "Baker\u2013Campbell\u2013Hausdorff" . "Baker\u2013Campbell\u2013Hausdorff series" . "here" . "Baker-Campbell-Haussdorf" . "Baker\u2013Campbell\u2013Hausdorff expansion" . "Zassenhaus dual expansion" . "Eichler's proof of the CBH theorem" .