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On least squares g-inverses and minimum norm g-inverses of a bordered matrix

✍ Scribed by Wenbin Guo; Musheng Wei; Mingjie Wang

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
170 KB
Volume
416
Category
Article
ISSN
0024-3795

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Problem 142. : The symmetric genus of a
Problem 142. : The symmetric genus of a group G is the minimum genus of a surface on which G acts. Let An denote the alternating group of degree n, γG denote the genus of the group G, and σ(G) the symmetric genus of G. Is the following conjecture true? Conjecture: For at least one n, γ(An)<σ(An)?
📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 50 KB

## Reseirrch problems Problem 142. The symmetric genus of a group G is the minimum genus of a surface on which G acts. Let A, denote the alternating group of degree n, y(G) denote the genus of the group G, and a(G) the symmetric genus of G. Is the following conjecture true? Conjecture: For at leas