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001-es BibID:	BIBFORM121392
035-os BibID:	(WoS)001180886600001 (Scopus)85187516861
Első szerző:	Székelyhidi László (matematikus)
Cím:	New results on spectral synthesis / László Székelyhidi
Dátum:	2024
ISSN:	0026-9255 1436-5081
Megjegyzések:	In our former paper we introduced the concept of localization of ideals in the Fourier algebra of a locally compact Abelian group. It turns out that localizability of a closed ideal in the Fourier algebra is equivalent to the synthesizability of the annihilator of that closed ideal which corresponds to this ideal in the measure algebra. This equivalence provides an effective tool to prove synthesizability of varieties on locally compact Abelian groups. In this paper we utilize this tool to show that when investigating synthesizability of a variety, roughly speaking compact elements of the group can be neglected. Our main result is that spectral synthesis holds on a locally compact Abelian group G if and only if it holds on G/B, where B is the closed subgroup of all compact elements. In particular, spectral synthesis holds on compact Abelian groups. Also we obtain a simple proof for the characterization theorem of spectral synthesis on discrete Abelian groups.
Tárgyszavak:	Természettudományok Matematika- és számítástudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Spectral synthesis Variety
Megjelenés:	Monatshefte für Mathematik. - 204 : -(2024), p. 1-6. -
Pályázati támogatás:	K-134191 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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