We prove the C¹-density of every -conjugacy class in the closed subset of diffeomorphisms of the circle with a given irrational rotation number.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-fm227-2-2, author = {Christian Bonatti and Nancy Guelman}, title = {Smooth conjugacy classes of circle diffeomorphisms with irrational rotation number}, journal = {Fundamenta Mathematicae}, volume = {227}, year = {2014}, pages = {129-162}, zbl = {06339422}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm227-2-2} }
Christian Bonatti; Nancy Guelman. Smooth conjugacy classes of circle diffeomorphisms with irrational rotation number. Fundamenta Mathematicae, Tome 227 (2014) pp. 129-162. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm227-2-2/