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Morse index minimum energy the reviewer, Maps of minimum energy from simply connected Lie groups, to appear in Ann. Global Anal. Geom. 2 (1984). Moreover the computation of the index in the first assertion of Theorem 1 is incorrect, because the author assumes that the map has maximal rank. In Theorem 2 a reformulation of the condition of harmonicity for maps into Lie groups is given in terms of the equations satisfied by the pullback of the Maurer-Cartan form]