{"title":"JAZ volume 112 issue 1 Cover and Back matter","authors":"","doi":"10.1017/s1446788721000252","DOIUrl":"https://doi.org/10.1017/s1446788721000252","url":null,"abstract":"","PeriodicalId":50007,"journal":{"name":"Journal of the Australian Mathematical Society","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72701025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"AUTOMORPHISMS AND SYMPLECTIC LEAVES OF CALOGERO–MOSER SPACES","authors":"C'edric Bonnaf'e","doi":"10.1017/S1446788722000180","DOIUrl":"https://doi.org/10.1017/S1446788722000180","url":null,"abstract":"Abstract We study the symplectic leaves of the subvariety of fixed points of an automorphism of a Calogero–Moser space induced by an element of finite order of the normalizer of the associated complex reflection group. We give a parametrization à la Harish-Chandra of its symplectic leaves (generalizing earlier works of Bellamy and Losev). This result is inspired by the mysterious relations between the geometry of Calogero–Moser spaces and unipotent representations of finite reductive groups, which is the theme of another paper, C. Bonnafé [‘Calogero–Moser spaces vs unipotent representations’, Pure Appl. Math. Q., to appear, Preprint, 2021, arXiv:2112.13684].","PeriodicalId":50007,"journal":{"name":"Journal of the Australian Mathematical Society","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80269795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"$Lambda _s$\u0000 -NONUNIFORM MULTIRESOLUTION ANALYSIS","authors":"S. Pitchai Murugan, G. P. Youvaraj","doi":"10.1017/S1446788721000203","DOIUrl":"https://doi.org/10.1017/S1446788721000203","url":null,"abstract":"Abstract Gabardo and Nashed [‘Nonuniform multiresolution analyses and spectral pairs’, J. Funct. Anal. 158(1) (1998), 209–241] have introduced the concept of nonuniform multiresolution analysis (NUMRA), based on the theory of spectral pairs, in which the associated translated set \u0000$Lambda ={0,{r}/{N}}+2mathbb Z$\u0000 is not necessarily a discrete subgroup of \u0000$mathbb{R}$\u0000 , and the translation factor is \u0000$2textrm{N}$\u0000 . Here r is an odd integer with \u0000$1leq rleq 2N-1$\u0000 such that r and N are relatively prime. The nonuniform wavelets associated with NUMRA can be used in signal processing, sampling theory, speech recognition and various other areas, where instead of integer shifts nonuniform shifts are needed. In order to further generalize this useful NUMRA, we consider the set \u0000$widetilde {Lambda }={0,{r_1}/{N},{r_2}/{N},ldots ,{r_q}/{N}}+smathbb Z$\u0000 , where s is an even integer, \u0000$qin mathbb {N}$\u0000 , \u0000$r_i$\u0000 is an integer such that \u0000$1leq r_ileq sN-1,,(r_i,N)=1$\u0000 for all i and \u0000$Ngeq 2$\u0000 . In this paper, we prove that the concept of NUMRA with the translation set \u0000$widetilde {Lambda }$\u0000 is possible only if \u0000$widetilde {Lambda }$\u0000 is of the form \u0000${0,{r}/{N}}+smathbb Z$\u0000 . Next we introduce \u0000$Lambda _s$\u0000 -nonuniform multiresolution analysis ( \u0000$Lambda _s$\u0000 -NUMRA) for which the translation set is \u0000$Lambda _s={0,{r}/{N}}+smathbb Z$\u0000 and the dilation factor is \u0000$sN$\u0000 , where s is an even integer. Also, we characterize the scaling functions associated with \u0000$Lambda _s$\u0000 -NUMRA and we give necessary and sufficient conditions for wavelet filters associated with \u0000$Lambda _s$\u0000 -NUMRA.","PeriodicalId":50007,"journal":{"name":"Journal of the Australian Mathematical Society","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82633940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}