Geodesic
Some Remarks on IA Automorphisms of Free Groups
Canadian journal of mathematics, Tome 40 (1988) no. 5, pp. 1144-1155

Voir la notice de l'article provenant de la source Cambridge University Press

Let An be the automorphism group of the free group Fn of rank n, and let Kn be the normal subgroup of An consisting of those elements which induce the identity automorphism in the commutator quotient group . The group Kn has been called the group of IA automorphisms of Fn (see e.g. [1]). It was shown by Magnus [7] using earlier work of Nielsen [11] that Kn is finitely generated, with generating set the automorphisms and where x 1, x 2, ..., xn , is a chosen basis of Fn . 
McCool, J. Some Remarks on IA Automorphisms of Free Groups. Canadian journal of mathematics, Tome 40 (1988) no. 5, pp. 1144-1155. doi: 10.4153/CJM-1988-047-4
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