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Armenian Journal of Mathematics最新文献

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The Geometry of the Projective Action of $text{SL}(3,mathbb{R})$ from the Erlangen Perspective 从埃尔朗根视角看$text{SL}(3,mathbb{R})$ 的投影作用几何学
IF 0.4
Armenian Journal of Mathematics Pub Date : 2024-01-11 DOI: 10.52737/18291163-2024.16.1-1-28
D. Biswas, Ipsita Rajwar
{"title":"The Geometry of the Projective Action of $text{SL}(3,mathbb{R})$ from the Erlangen Perspective","authors":"D. Biswas, Ipsita Rajwar","doi":"10.52737/18291163-2024.16.1-1-28","DOIUrl":"https://doi.org/10.52737/18291163-2024.16.1-1-28","url":null,"abstract":"In this paper, we have investigated the projective action of the Lie group $text{SL}(3,mathbb{R})$ on the homogeneous space $mathbb{RP}^2$. In particular, we have studied the action of the subgroups of  $text{SL}(3,mathbb{R})$ on the non-degenerate conics in the space $mathbb{RP}^2$. Using the Iwasawa decomposition of $text{SL}(2,mathbb{R})$, we demonstrate that the isotropy subgroup of the projective unit circle is isomorphic to  $text{PSL}(2,mathbb{R})$ under certain conditions.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":"4 5","pages":""},"PeriodicalIF":0.4,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139438515","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}
引用次数: 0
Characterization of the Three-Variate Inverted Dirichlet Distributions 三变量倒置德里赫特分布的特征
IF 0.4
Armenian Journal of Mathematics Pub Date : 2023-12-14 DOI: 10.52737/18291163-2023.15.12-1-9
Mohamed Ben Farah
{"title":"Characterization of the Three-Variate Inverted Dirichlet Distributions","authors":"Mohamed Ben Farah","doi":"10.52737/18291163-2023.15.12-1-9","DOIUrl":"https://doi.org/10.52737/18291163-2023.15.12-1-9","url":null,"abstract":"In this paper, we prove a characterization of three-variate inverted Dirichlet distributions by an independence property. The main technical challenge was a problem involving the solution of a related functional equation.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":"272 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139002151","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}
引用次数: 0
A Combinatorial Interpretation of the Padovan Generalized Polynomial Sequence 帕多万广义多项式序列的组合解释
IF 0.4
Armenian Journal of Mathematics Pub Date : 2023-11-28 DOI: 10.52737/18291163-2023.15.11-1-9
Renata Passos Machado Vieira, Francisco Regis Vieira Alves, Paula Maria Machado Cruz Catarino
{"title":"A Combinatorial Interpretation of the Padovan Generalized Polynomial Sequence","authors":"Renata Passos Machado Vieira, Francisco Regis Vieira Alves, Paula Maria Machado Cruz Catarino","doi":"10.52737/18291163-2023.15.11-1-9","DOIUrl":"https://doi.org/10.52737/18291163-2023.15.11-1-9","url":null,"abstract":"We investigate a combinatorial interpretation of the Padovan polynomial sequence, also addressing its polynomial extensions. We thus include the Tridovan polynomial sequence, Tetradovan polynomial sequences, leading up to the Z-dovan polynomial generalization.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":"51 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139222302","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}
引用次数: 0
On the Distance Spectrum and Distance-Based Topological Indices of Central Vertex-Edge Join of Three Graphs 三图中心点边连接的距离谱和基于距离的拓扑指标
Armenian Journal of Mathematics Pub Date : 2023-10-10 DOI: 10.52737/18291163-2023.15.10-1-16
T. Haritha, A.V. Chithra
{"title":"On the Distance Spectrum and Distance-Based Topological Indices of Central Vertex-Edge Join of Three Graphs","authors":"T. Haritha, A.V. Chithra","doi":"10.52737/18291163-2023.15.10-1-16","DOIUrl":"https://doi.org/10.52737/18291163-2023.15.10-1-16","url":null,"abstract":"In this paper, we introduce a new graph operation based on a central graph called central vertex-edge join (denoted by $G_{n_1}^C triangleright (G_{n_2}^Vcup G_{n_3}^E)$) and then determine the distance spectrum of $G_{n_1}^C triangleright (G_{n_2}^Vcup G_{n_3}^E)$ in terms of the adjacency spectra of regular graphs $G_1$, $G_2$ and $G_3$ when $G_1$ is triangle-free. As a consequence of this result, we construct new families of non-D-cospectral D-equienergetic graphs. Moreover, we determine bounds for the distance spectral radius and distance energy of the central vertex-edge join of three regular graphs. In addition, we provide its results related to graph invariants like eccentric-connectivity index, connective eccentricity index, total-eccentricity index, average eccentricity index, Zagreb eccentricity indices, eccentric geometric-arithmetic index, eccentric atom-bond connectivity index, Wiener index. Using these results, we calculate the topological indices of the organic compounds Methylcyclobutane $(C_5H_{10})$ and Spirohexane $(C_6H_{10})$.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136294018","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}
引用次数: 0
Generalized Rational Evaluation Subgroups of the Inclusion between Complex Projective Spaces 复射影空间间包含的广义有理评价子群
IF 0.4
Armenian Journal of Mathematics Pub Date : 2023-09-05 DOI: 10.52737/18291163-2023.15.9-1-6
J. Gatsinzi
{"title":"Generalized Rational Evaluation Subgroups of the Inclusion between Complex Projective Spaces","authors":"J. Gatsinzi","doi":"10.52737/18291163-2023.15.9-1-6","DOIUrl":"https://doi.org/10.52737/18291163-2023.15.9-1-6","url":null,"abstract":"We use a model of mapping spaces to compute the generalized rational Gottlieb groups of the inclusion $i_{n,k}: mathbb{C}P^n hookrightarrow mathbb{C}P^{n+k}$ between complex projective spaces.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48575017","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}
引用次数: 0
A Mesh-Free Algorithm to Solve an Inverse Source Problem for Degenerate Two-Dimensional Parabolic Equation from Final Observations 从最终观测解退化二维抛物型方程反源问题的无网格算法
IF 0.4
Armenian Journal of Mathematics Pub Date : 2023-05-20 DOI: 10.52737/18291163-2023.15.8-1-11
K. Atifi
{"title":"A Mesh-Free Algorithm to Solve an Inverse Source Problem for Degenerate Two-Dimensional Parabolic Equation from Final Observations","authors":"K. Atifi","doi":"10.52737/18291163-2023.15.8-1-11","DOIUrl":"https://doi.org/10.52737/18291163-2023.15.8-1-11","url":null,"abstract":"The main purpose of this work is to propose a new network architecture model for deep learning applied to solve an inverse source problem for a two-dimensional degenerate parabolic equation from final observations with degeneracy occurring anywhere in the spatial domain.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42233066","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}
引用次数: 0
A Note on Location of the Zeros of Quaternionic Polynomials 关于四元数多项式零点位置的注记
IF 0.4
Armenian Journal of Mathematics Pub Date : 2023-04-27 DOI: 10.52737/10.52737/18291163-2023.15.7-1-12
I. A. Wani, A. Hussain
{"title":"A Note on Location of the Zeros of Quaternionic Polynomials","authors":"I. A. Wani, A. Hussain","doi":"10.52737/10.52737/18291163-2023.15.7-1-12","DOIUrl":"https://doi.org/10.52737/10.52737/18291163-2023.15.7-1-12","url":null,"abstract":"The purpose of this paper is to investigate the extensions of the classical Eneström-Kakeya theorem and its various generalizations concerning the distribution of zeros of polynomials from the complex to the quaternionic setting. Using a maximum modulus theorem and the zero set structure in the recently published theory of regular functions and polynomials of a quaternionic variable, we construct new bounds of the Eneström-Kakeya type for the zeros of these polynomials. The obtained results for this subclass of polynomials and slice regular functions give generalizations of a number of results previously reported in the relevant literature.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45649973","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}
引用次数: 0
A New Family of Number Sequences: Leonardo-Alwyn Numbers 一种新的数列:列奥纳多-阿尔文数
IF 0.4
Armenian Journal of Mathematics Pub Date : 2023-04-13 DOI: 10.52737/18291163-2023.15.6-1-13
Hasan Gökbaş
{"title":"A New Family of Number Sequences: Leonardo-Alwyn Numbers","authors":"Hasan Gökbaş","doi":"10.52737/18291163-2023.15.6-1-13","DOIUrl":"https://doi.org/10.52737/18291163-2023.15.6-1-13","url":null,"abstract":"In this study, we define a new type of number sequence called Leonardo-Alwyn sequence. We obtain the Binet formula, generating function and some relations for these numbers. Moreover, we give the matrix representation of the Leonardo-Alwyn numbers.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42997037","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}
引用次数: 0
Optimality of the Least Sum of Logarithms in the Problem of Matching Map Recovery in the Presence of Noise and Outliers 有噪声和异常情况下匹配图恢复问题中最小对数和的最优性
IF 0.4
Armenian Journal of Mathematics Pub Date : 2023-03-30 DOI: 10.52737/18291163-2023.15.5-1-9
T. Galstyan, A. Minasyan
{"title":"Optimality of the Least Sum of Logarithms in the Problem of Matching Map Recovery in the Presence of Noise and Outliers","authors":"T. Galstyan, A. Minasyan","doi":"10.52737/18291163-2023.15.5-1-9","DOIUrl":"https://doi.org/10.52737/18291163-2023.15.5-1-9","url":null,"abstract":"We consider the problem of estimating the matching map between two sets of feature-vectors observed in a noisy environment and contaminated by outliers. It was already known in the literature that in the outlier-free setting, the least sum of squares (LSS) and the least sum of logarithms (LSL) are both minimax-rate-optimal. It has been recently proved that the optimality properties of the LSS continue to hold in the case the data sets contain outliers. In this work, we show that the same is true for the LSL as well. Therefore, LSL has the same desirable properties as the LSS, and, in addition, it is minimax-rate-optimal in the outlier-free setting with heteroscedastic noise.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47585131","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}
引用次数: 0
Nonlocal Solvability of the Cauchy Problem for a System with Negative Functions of the Variable $t$ 变量$t为负函数系统Cauchy问题的非局部可解性$
IF 0.4
Armenian Journal of Mathematics Pub Date : 2023-03-22 DOI: 10.52737/18291163-2023.15.4-1-10
M. Dontsova
{"title":"Nonlocal Solvability of the Cauchy Problem for a System with Negative Functions of the Variable $t$","authors":"M. Dontsova","doi":"10.52737/18291163-2023.15.4-1-10","DOIUrl":"https://doi.org/10.52737/18291163-2023.15.4-1-10","url":null,"abstract":"We obtain sufficient conditions for the existence and uniqueness of a local solution of the Cauchy problem for a quasilinear system with negative functions of the variable $t$ and show that the solution has the same $x$-smoothness as the initial function. We also obtain sufficient conditions for the existence and uniqueness of a nonlocal solution of the Cauchy problem for a quasilinear system with negative functions of the variable $t$.","PeriodicalId":42323,"journal":{"name":"Armenian Journal of Mathematics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49620976","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}
引用次数: 0
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