Commutators of diffeomorphisms, III: a group which is not perfect.
Mather, John N.
Commentarii mathematici Helvetici, Tome 60 (1985), p. 122-124 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1985-01-01
EUDML-ID : urn:eudml:doc:140003 
@article{GDZPPN002065665,
     title = {Commutators of diffeomorphisms, III: a group which is not perfect.},
     journal = {Commentarii mathematici Helvetici},
     volume = {60},
     year = {1985},
     pages = {122-124},
     zbl = {0575.58011},
     url = {http://dml.mathdoc.fr/item/GDZPPN002065665}
}

Mather, John N. Commutators of diffeomorphisms, III: a group which is not perfect.. Commentarii mathematici Helvetici, Tome 60 (1985) pp. 122-124. http://gdmltest.u-ga.fr/item/GDZPPN002065665/