𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A note on the equation θ̄gq = n + λΣ

✍ Scribed by Shalom Eliahou; Michel Kervaire


Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
565 KB
Volume
62
Category
Article
ISSN
0378-3758

No coin nor oath required. For personal study only.

✦ Synopsis


Let 0 be a cyclic difference list. We prove two theorems on the p-divisibility of the parameters of 0, where p is a prime number. The second result concerns p -2 and extends to cyclic difference lists a well known result of Turyn for cyclic difference sets. Difference lists on the cyclic group of order 8 are studied in detail.


📜 SIMILAR VOLUMES


Compressible difference lists an appendi
✍ Alain Eckmann; Shalom Eliahou; Michel Kervaire 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 198 KB

A difference list 0 on a finite group G is called compressed if 0(~ is an integer, and it is called compressible if 0 + a. G is compressed for some integer a. We discuss the compressibility property, mostly for difference lists on cyclic groups.

A note on the Davis-Kahan sin Θ⊖ theorem
✍ Jianjun Xie 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 181 KB

By using a series of inequalities for singular values of matrix products, we obtain perturbation theorems for invariant subspaces of Hermitian matrices, which are sharper than the second Davis-Kahan sin O theorem.