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Moscow Journal of Combinatorics and Number Theory最新文献

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Borsuk’s problem, Boltyanski’s illumination problem, and circumradius Borsuk的问题，Boltyanski的照明问题，还有圆周
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-09-23 DOI: 10.2140/moscow.2023.12.223
Arthur Bikeev
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引用次数: 0
Chromatic number of a line with geometric progressions of forbidden distances and the complexity of recognizing distance graphs 具有禁止距离的几何级数的线的色数和识别距离图的复杂性
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-09-23 DOI: 10.2140/moscow.2023.12.247
Georgy Sokolov
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引用次数: 0
On families with bounded matching number 关于有界匹配数的族
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-09-23 DOI: 10.2140/moscow.2023.12.197
Peter Frankl, Jian Wang
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引用次数: 0
Ramsey properties for integer sequences with restricted gaps 具有限制间隙的整数序列的Ramsey性质
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-09-23 DOI: 10.2140/moscow.2023.12.181
Bruce M. Landman, Aaron Robertson, Quinn Robertson
{"title":"Ramsey properties for integer sequences with restricted gaps","authors":"Bruce M. Landman, Aaron Robertson, Quinn Robertson","doi":"10.2140/moscow.2023.12.181","DOIUrl":"https://doi.org/10.2140/moscow.2023.12.181","url":null,"abstract":"","PeriodicalId":36590,"journal":{"name":"Moscow Journal of Combinatorics and Number Theory","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135966687","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 a sum involving squarefull numbers, II 在涉及平方数的和上
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-09-23 DOI: 10.2140/moscow.2023.12.241
Isao Kiuchi
{"title":"On a sum involving squarefull numbers, II","authors":"Isao Kiuchi","doi":"10.2140/moscow.2023.12.241","DOIUrl":"https://doi.org/10.2140/moscow.2023.12.241","url":null,"abstract":"","PeriodicalId":36590,"journal":{"name":"Moscow Journal of Combinatorics and Number Theory","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135966684","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
Integer sequences without singleton intersection 没有单例交集的整数序列
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-06-04 DOI: 10.2140/moscow.2023.12.127
P. Frankl, Jian Wang
{"title":"Integer sequences without singleton intersection","authors":"P. Frankl, Jian Wang","doi":"10.2140/moscow.2023.12.127","DOIUrl":"https://doi.org/10.2140/moscow.2023.12.127","url":null,"abstract":"","PeriodicalId":36590,"journal":{"name":"Moscow Journal of Combinatorics and Number Theory","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48214007","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 monogenity of certain pure numberfields defined by xpr−a with non-square-free parameter 关于具有非平方自由参数的xpr−A定义的某些纯数域的单胚性的一个注记
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-06-04 DOI: 10.2140/moscow.2023.12.147
O. Kchit
{"title":"A note on monogenity of certain pure number\u0000fields defined by xpr−a with non-square-free parameter","authors":"O. Kchit","doi":"10.2140/moscow.2023.12.147","DOIUrl":"https://doi.org/10.2140/moscow.2023.12.147","url":null,"abstract":"","PeriodicalId":36590,"journal":{"name":"Moscow Journal of Combinatorics and Number Theory","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47231994","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
Characterizing maximal shifted intersecting setsystems and short injective proofs of the Erdős–Ko–Rado and Hilton–Milnertheorems Erdõs–Ko–Rado和Hilton–Milner定理的极大移位相交集系统的刻画和短内射证明
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-03-29 DOI: 10.2140/moscow.2023.12.89
Trong Tuan Nguyen, Anh Thi Nguyen
{"title":"Characterizing maximal shifted intersecting set\u0000systems and short injective proofs of the Erdős–Ko–Rado and Hilton–Milner\u0000theorems","authors":"Trong Tuan Nguyen, Anh Thi Nguyen","doi":"10.2140/moscow.2023.12.89","DOIUrl":"https://doi.org/10.2140/moscow.2023.12.89","url":null,"abstract":"","PeriodicalId":36590,"journal":{"name":"Moscow Journal of Combinatorics and Number Theory","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45300596","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
Estimating the strong r-colorability threshold inrandom hypergraphs 随机超图强r-可色性阈值的估计
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-03-29 DOI: 10.2140/moscow.2023.12.57
A. Khuzieva, T. Matveeva, D. Shabanov
{"title":"Estimating the strong r-colorability threshold in\u0000random hypergraphs","authors":"A. Khuzieva, T. Matveeva, D. Shabanov","doi":"10.2140/moscow.2023.12.57","DOIUrl":"https://doi.org/10.2140/moscow.2023.12.57","url":null,"abstract":"","PeriodicalId":36590,"journal":{"name":"Moscow Journal of Combinatorics and Number Theory","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43618862","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 a problem related to “second” bestapproximations to a real number 关于实数的“第二”最佳逼近问题
Moscow Journal of Combinatorics and Number Theory Pub Date : 2023-03-22 DOI: 10.2140/moscow.2023.12.175
P. Semenyuk
{"title":"On a problem related to “second” best\u0000approximations to a real number","authors":"P. Semenyuk","doi":"10.2140/moscow.2023.12.175","DOIUrl":"https://doi.org/10.2140/moscow.2023.12.175","url":null,"abstract":"For a given irrational number $alpha$ one can define an irrationality measure function $psi_{alpha}^{[2]}(t) = minlimits_{substack{(q, p)colon q, p inmathbb{Z}, 1leqslant qleqslant t, (p, q) neq (p_n, q_n) ~forall ninmathbb{Z_{+}}}} |qalpha -p|$, related to the second-best approximations to $alpha$. In 2017 Moshchevitin studied the corresponding Diophantine constant $mathfrak{k}(alpha) = liminflimits_{ttoinfty} t cdotpsi_{alpha}^{[2]}(t)$ and the corresponding spectrum $mathbb{L}_2 = { lambda ~| ~existsalphainmathbb{Rsetminus Q} colon lambda = mathfrak{k}(alpha) }$. In particular, he calculated two largest elements of the spectrum $mathbb{L}_2$. In the present paper we calculate the value for the third element of the spectrum $mathbb{L}_2$.","PeriodicalId":36590,"journal":{"name":"Moscow Journal of Combinatorics and Number Theory","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44742844","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: 1
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