首页/论文/2409.03345

arXiv 2409.033452024-09math.GR

Baby Monster 是具有至多2个相同次数不可约特征标的最大群

The Baby Monster is the largest group with at most $2$ irreducible characters with the same degree

Juan Martínez Madrid

备注：: 16 pages, few mistakes corrected, accepted for publication in the Bulletin of the London Mathematical Society

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

摘要英文摘要相关论文

AI总结：

本文分类了不可约特征标次数重数至多2的有限群，证明Baby Monster是这类群中最大的群。

摘要：

我们分类了所有有限群，其中所有不可约特征标次数出现的重数至多为2。由此，我们证明了具有至多2个相同次数不可约特征标的最大群是Baby Monster。

英文摘要：

We classify all finite groups such that all irreducible character degrees appear with multiplicity at most $2$. As a consequence, we prove that the largest group with at most $2$ irreducible characters of the same degree is the Baby Monster.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

阅读原文

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

本文内容

摘要英文摘要相关论文

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

继续探索

相关论文

"McKay's E7 observation on the Baby Monster" and "McKay's E6 observation on the largest Fischer group"

E7 part: In this paper, we study McKay's E7 observation on the Baby Monster. By investigating so called derived c=7/10 Virasoro vectors, we show that there is a natural correspondence between dihedral subgroups of the Baby Monster and certain subalgebras of the Baby Monster vertex operator algebra which are constructed by the nodes of the affine E7 diagram. This allows us to reinterpret McKay's E7 observation via the theory of vertex operator algebras. For a class of vertex operator algebras including the Moonshine module, we will show that the product of two Miyamoto involutions associated to…

2011-08-22math.GRmath.QA

Extended F_4-buildings and the Baby Monster

The Baby Monster group B acts naturally on a geometry E(B) with diagram c.F_4(t) for t=4 and the action of B on E(B) is flag-transitive. It possesses the following properties: (a) any two elements of type 1 are incident to at most one common element of type 2, and (b) three elements of type 1 are pairwise incident to common elements of type 2 iff they are incident to a common element of type 5. It is shown that E(B) is the only (non-necessary flag-transitive) c.F_4(t)-geometry, satisfying t=4, (a) and (b), thus obtaining the first characterization of B in terms of an incidence geometry, simila…

2000-12-29math.COmath.GR

自对偶顶点算子超代数与宝贝怪兽 (Self-dual Vertex Operator Super Algebras and the Baby Monster)

Selbstduale Vertexoperatorsuperalgebren und das Babymonster (Self-dual Vertex Operator Super Algebras and the Baby Monster)

本文研究自对偶顶点算子超代数，构造中心荷23.5的较短月光模，宝贝怪兽群作用其上，并引入极值SVOAs概念，给出存在性结果。

2007-06-04math.GRmath.QA

较短月光模的对称群

The Group of Symmetries of the shorter Moonshine Module

本文证明了较短月光模（Baby Monster顶点算子超代数）的自同构群为Baby Monster单群与2阶循环群的直积。

2010-09-02math.GRmath.QA

Rational Generalised Moonshine from Abelian Orbifoldings of the Moonshine Module

We consider orbifoldings of the Moonshine Module with respect to the abelian group generated by a pair of commuting Monster group elements with one of prime order $p=2,3,5,7$ and the other of order $pk$ for $k=1$ or $k$ prime. We show that constraints arising from meromorphic orbifold conformal field theory allow us to demonstrate that each orbifold partition function with rational coefficients is either constant or is a hauptmodul for an explicitly found modular fixing group of genus zero. We thus confirm in the cases considered the Generalised Moonshine conjectures for all rational modular f…

2002-02-26hep-thmath.GRmath.QA

$\text{M}$, $\text{B}$ and $\text{Co}_1$ are recognisable by their prime graphs

The prime graph, or Gruenberg--Kegel graph, of a finite group $G$ is the graph $Γ(G)$ whose vertices are the prime divisors of $|G|$, and whose edges are the pairs $\{p,q\}$ for which $G$ contains an element of order $pq$. A finite group $G$ is recognisable by its prime graph if every finite group $H$ with $Γ(H)=Γ(G)$ is isomorphic to $G$. By a result of Cameron and Maslova, every such group must be almost simple, so one natural case to investigate is that in which $G$ is one of the $26$ sporadic simple groups. Existing work of various authors answers the question of recognisability by prime g…

2022-02-15math.GR

更多相关论文收起更多论文

The intersection graph of a finite simple group has diameter at most 5

Let $G$ be a non-abelian finite simple group. In addition, let $Δ_G$ be the intersection graph of $G$, whose vertices are the proper nontrivial subgroups of $G$, with distinct subgroups joined by an edge if and only if they intersect nontrivially. We prove that the diameter of $Δ_G$ has a tight upper bound of 5, thereby resolving a question posed by Shen (2010). Furthermore, a diameter of 5 is achieved only by the baby monster group and certain unitary groups of odd prime dimension.

2021-01-28math.GR

$2A$-Majorana Representations of $A_{12}$

Majorana representations have been introduced by Ivanov in order to provide an axiomatic framework for studying the actions on the Griess algebra of the Monster and of its subgroups generated by Fischer involutions. A crucial step in this programme is to obtain an explicit description of the Majorana representations of $A_{12}$, for this might eventually lead to a new and independent construction of the Monster group. In this paper we prove that $A_{12}$ has a unique Majorana representation on the set of its involutions of type $2^2$ and $2^6$ (that is the involutions that fall into the class …

2020-04-08math.GR

魔群有限单群的阶

The Order of the Monster Finite Simple Group

本文通过基于Griess代数轴幂等元计数的计算方法，借助mmgroup软件完成了首个自包含的魔群阶计算，还证明了魔群的自同构群性质、对合共轭类数量并确定了小魔群的阶。

2025-08-01hep-thmath.GRmath.QA

Automizers as extended reflection groups

Broué, Malle and Michel have shown that the automizer of an abelian Sylow p-subgroup in a finite simple Chevalley group is an irreducible complex reflection group, for p not too small and different from the defining characteristic. The aim is this note is to show that a suitable version of this property holds for general finite groups. As an example, the automizer of an 11-Sylow subgroup in the Monster is the 2-dimensional complex reflection group G_{16}.

2010-10-21math.GRmath.RT

Integrality, Duality and Finiteness in Combinatoric Topological Strings

A remarkable result at the intersection of number theory and group theory states that the order of a finite group $G$ (denoted $|G|$) is divisible by the dimension $d_R$ of any irreducible complex representation of $G$. We show that the integer ratios ${ |G|^2 / d_R^2 } $ are combinatorially constructible using finite algorithms which take as input the amplitudes of combinatoric topological strings ($G$-CTST) of finite groups based on 2D Dijkgraaf-Witten topological field theories ($G$-TQFT2). The ratios are also shown to be eigenvalues of handle creation operators in $G$-TQFT2/$G$-CTST. These…

2021-08-19hep-thmath.COmath.GR