A new characterisation of quasi-hereditary Nakayama algebras and applications

Autor:	Marczinzik, René, Sen, Emre
Rok vydání:	2021
Předmět:	Mathematics - Representation Theory Mathematics - Combinatorics 16G10 16E10 11B39
Druh dokumentu:	Working Paper
Popis:	We call a finite dimensional algebra A S-connected if the projective dimensions of the simple A-modules form an interval. We prove that a Nakayama algebra A is S-connected if and only if A is quasi-hereditary. We apply this result to improve an inequality for the global dimension of quasi-hereditary Nakayama algebras due to Brown. We furthermore classify the Nakayama algebras where equality is attained in Brown's inequality and show that they are enumerated by the even indexed Fibonacci numbers if the algebra is cyclic and by the odd indexed Fibonacci numbers if the algebra is linear. Comment: v2. typos fixed, references added
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2109.03441 Zobrazit plný text záznamu View this record from Arxiv