<span class="searchmatch">nilsystem</span> (plural <span class="searchmatch">nilsystems</span>) (mathematics) A topological system (H,X) such that a nilpotent Lie group G = <A(X), a(H)> acts transitively on X....
<span class="searchmatch">nilsystems</span> plural of <span class="searchmatch">nilsystem</span> 2016, V. Bergelson, A. Leibman, “IPr* recurrence and <span class="searchmatch">nilsystems</span>”, in arXiv[1]: We prove that <span class="searchmatch">nilsystems</span> possess the IPr*-recurrence...
there exists an element x of X and a homomorphism H such that (H,X) is a <span class="searchmatch">nilsystem</span>. 2016, Yonatan Gutman, Freddie Manners, Péter P. Varjú, “The structure...