NILMANIFOLD

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On the density of Birkhoff sums for Anosov diffeomorphisms
《Science China Mathematics》2022年第2期319-330,共12页Shaobo Gan Yi Shi Mingyang Xia 
supported by National Natural Science Foundation of China(Grant Nos.11771025 and 11831001);supported by National Natural Science Foundation of China(Grant Nos.12071007 and 11831001)。
Let f : M → M be an Anosov diffeomorphism on a nilmanifold. We consider Birkhoff sums for a Holder continuous observation along periodic orbits. We show that if there are two Birkhoff sums distributed at both sides o...
关键词:Anosov diffeomorphism Birkhoff sum periodic point NILMANIFOLD 
Nielsen type numbers and homotopy minimal periods for maps on the 3-nilmanifolds
《Science China Mathematics》2008年第3期351-360,共10页Jong Bum LEE 
the Sogang University (KOREA) Research Grant in 2006 and in part by a grant from ABRL by Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (Grant No. H00021);a BMEC grant (Grant No. KZ200710025012)
For all continuous maps on the 3-nilmanifolds, we give explicit formulae for a complete computation of the Nielsen type numbers NP_n(f)and Nφ_n(f). The most general cases were explored by Heath and Keppelmann and the...
关键词:homotopy minimal period Nielsen number Nielsen type number NILMANIFOLD 55M20 57S30 
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