Pub Date : 2021-07-01DOI: 10.33048/semi.2021.18.055
A. Blali, A. E. Amrani, R. A. Hassani, Abdelhak Razouki
{"title":"On the uniqueness of I-limits of sequences","authors":"A. Blali, A. E. Amrani, R. A. Hassani, Abdelhak Razouki","doi":"10.33048/semi.2021.18.055","DOIUrl":"https://doi.org/10.33048/semi.2021.18.055","url":null,"abstract":"","PeriodicalId":45858,"journal":{"name":"Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42027722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-28DOI: 10.33048/semi.2021.18.053
S. Ibraev, B. E. Turbayev
{"title":"Cohomology for the Lie algebra of type $A_2$ over a field of characteristic $2$","authors":"S. Ibraev, B. E. Turbayev","doi":"10.33048/semi.2021.18.053","DOIUrl":"https://doi.org/10.33048/semi.2021.18.053","url":null,"abstract":"","PeriodicalId":45858,"journal":{"name":"Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46874141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-23DOI: 10.33048/semi.2021.18.052
A. A. Kozhevin
{"title":"Feature selection based on statistical estimation of mutual information","authors":"A. A. Kozhevin","doi":"10.33048/semi.2021.18.052","DOIUrl":"https://doi.org/10.33048/semi.2021.18.052","url":null,"abstract":"","PeriodicalId":45858,"journal":{"name":"Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45102022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-16DOI: 10.33048/semi.2021.18.134
L. Shalaginov
A k-regular graph is called a divisible design graph (DDG for short) if its vertex set can be partitioned into m classes of size n, such that two distinct vertices from the same class have exactly λ1 common neighbors, and two vertices from different classes have exactly λ2 common neighbors. 4 × n-lattice graph is the line graph of K4,n. This graph is a DDG with parameters (4n, n+ 2, n − 2, 2, 4, n). In the paper we consider DDGs with these parameters. We prove that if n is odd then such graph can only be a 4 × n-lattice graph. If n is even we characterise all DDGs with such parameters. Moreover, we characterise all DDGs with parameters (4n, 3n − 2, 3n − 6, 2n − 2, 4, n) which are related to 4 × n-lattice graphs.
{"title":"Divisible design graphs with parameters $(4n,n+2,n-2,2,4,n)$ and $(4n,3n-2,3n-6,2n-2,4,n)$","authors":"L. Shalaginov","doi":"10.33048/semi.2021.18.134","DOIUrl":"https://doi.org/10.33048/semi.2021.18.134","url":null,"abstract":"A k-regular graph is called a divisible design graph (DDG for short) if its vertex set can be partitioned into m classes of size n, such that two distinct vertices from the same class have exactly λ1 common neighbors, and two vertices from different classes have exactly λ2 common neighbors. 4 × n-lattice graph is the line graph of K4,n. This graph is a DDG with parameters (4n, n+ 2, n − 2, 2, 4, n). In the paper we consider DDGs with these parameters. We prove that if n is odd then such graph can only be a 4 × n-lattice graph. If n is even we characterise all DDGs with such parameters. Moreover, we characterise all DDGs with parameters (4n, 3n − 2, 3n − 6, 2n − 2, 4, n) which are related to 4 × n-lattice graphs.","PeriodicalId":45858,"journal":{"name":"Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42044226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-15DOI: 10.33048/semi.2021.18.049
B. Imomnazarov, A. Mikhailov, I. Khaydarov, A. Kholmurodov
{"title":"Numerical solution of the solute transfer problem in porous elastic clay shale","authors":"B. Imomnazarov, A. Mikhailov, I. Khaydarov, A. Kholmurodov","doi":"10.33048/semi.2021.18.049","DOIUrl":"https://doi.org/10.33048/semi.2021.18.049","url":null,"abstract":"","PeriodicalId":45858,"journal":{"name":"Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49307192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-15DOI: 10.33048/semi.2021.18.050
A. Popov
{"title":"Cubature formulas on the sphere that are invariant under the transformations of the dihedral groups of rotations with inversion","authors":"A. Popov","doi":"10.33048/semi.2021.18.050","DOIUrl":"https://doi.org/10.33048/semi.2021.18.050","url":null,"abstract":"","PeriodicalId":45858,"journal":{"name":"Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49302112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-04DOI: 10.33048/semi.2021.18.047
A. C. Cavalheiro
{"title":"Existence results for a class of nonlinear degenerate Navier problems","authors":"A. C. Cavalheiro","doi":"10.33048/semi.2021.18.047","DOIUrl":"https://doi.org/10.33048/semi.2021.18.047","url":null,"abstract":"","PeriodicalId":45858,"journal":{"name":"Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47943253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-03DOI: 10.33048/semi.2021.18.045
E. O. Shumakova
{"title":"Groups of central units of rank 1 of integral group rings of Frobenius metacyclic groups","authors":"E. O. Shumakova","doi":"10.33048/semi.2021.18.045","DOIUrl":"https://doi.org/10.33048/semi.2021.18.045","url":null,"abstract":"","PeriodicalId":45858,"journal":{"name":"Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47153445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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