▁T 0 ▁top ologies ▁on ▁a ▁set ▁with ▁n ▁points , ▁denoted ▁T 0 ( n ), ▁is ▁related ▁to ▁T ( n ) ▁by ▁the ▁formula ▁ ▁where ▁S ( n , k ) ▁denotes ▁the ▁St ir ling ▁number ▁of ▁the ▁second ▁kind . ▁ ▁See ▁also ▁ ▁Fin ite ▁geometry ▁Fin ite ▁metric ▁space ▁Top ological ▁combin ator ics ▁ ▁References ▁ ▁Sing ular ▁hom ology ▁groups ▁and ▁hom ot opy ▁groups ▁of ▁finite ▁topological ▁spaces , ▁Michael ▁C . ▁McC ord , ▁Duke ▁Math . ▁J . ▁Volume ▁ 3 3 , ▁Number ▁ 3 ▁( 1 9 6 6 ), ▁ 4 6 5 - 4 7 4 . ▁ ▁External ▁links ▁Notes ▁and ▁reading ▁materials ▁on ▁finite ▁topological ▁spaces , ▁J . P . ▁MA Y ▁ ▁Category : Top ological ▁spaces ▁Category : Com bin ator ics <0x0A> </s> ▁Christoph ia ▁am m ob ia ▁is ▁a ▁species ▁of ▁sn out ▁moth ▁in ▁the ▁genus ▁Christoph ia . ▁It ▁was ▁described ▁by ▁Mark ▁I . ▁F alk ov it sh ▁in ▁ 1 9 9 9 ▁and ▁is ▁known ▁from ▁U z bek istan . ▁ ▁The ▁lar va e ▁have ▁been ▁recorded ▁feed ing ▁on ▁Hal ox yl on ▁species . ▁ ▁References ▁ ▁Category : M oth s ▁described ▁in ▁ 1 9 9 9 ▁Category : Ph yc it ini <0x0A> </s> ▁" Mat rim ony : ▁Maybe ▁You " ▁is ▁a ▁song ▁by ▁American ▁soul ▁singer ▁Max well . ▁Re leased ▁in