Month: December 2023

Binary Cyclic Group Codes

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Mustafa Kemal Turak, Dokuz Eylül University. Date: 4th of  January, 2024, Thursday, Time: 11.00 – 12:00. Place: Dokuz Eylül Univ., Tınaztepe Campus, Faculty of Science, Department of Mathematics, Room B206.

Abstract: In this talk, we will first give the definition of cyclic codes. We will then show that each cyclic code can be seen as an ideal in the quotient ring F[x]/(x^{n}-1). Next, we will introduce group codes and examine the relationship between cyclic group codes and cyclic codes.  

Accessibility for Everyone in Career: Disability and Society

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This month’s theme of our career event, organized jointly by DEU Faculty of Science, Department of Mathematics and Department of Statistics, in cooperation with DEU Career Planning Center, is “Accessibility for Everyone in Career”. The talk titled “Disability and Society”, which will be held under the moderation of Prof. Dr. Özlem Ege ORUÇ and with the participation of Lawyer Melike TOKSOY, is open to everyone and everyone who is interested is welcome (Those who are interested can contact Assoc. Prof. Dr. Özgül Vupa ÇİLENGİROĞLU or Asst.Prof. Dr. Celal Cem SARIOĞLU.).

Speaker: Av. Melike TOKSOY
Moderator: Prof. Dr. Özlem EGE ORUÇ
Date and Time: 20.12.2023, 14:30
Location: Online DEU
Channel: DEÜİSTATİSTİKKARİYER

ATA FORECASTING METHOD AS A BENCHMARK

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Prof. Dr. Güçkan YAPAR, Department of Statistics, Faculty of Science, DEU, İzmir Date: December 13, 2023, Wednesday Time: 15:00 Place: Classroom B256, Department of Mathematics, Faculty of Science, DEU, İzmir.

Abstract: ATA forecasting method is a new method which is proposed as an alternative to basic forecasting method exponential smoothing (ES) and ARIMA. Although Ata method is structurally similar to the ES method but it is completely different in content. Ata method is simple, fast and more accurate than its alternatives. Ata method has taken its place in the literature by proving its success with its forecasting performance in M-competition data sets.

Torsion Free Covers of Line Quivers

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Canan Özeren, Dokuz Eylül University. Date: 6th of December, 2023, Wednesday, Time: 13.30 – 14.30. Place: Dokuz Eylül Univ., Tınaztepe Campus, Faculty of Science, Department of Mathematics, Room B206 (Online-Sakai-Graduate Meetings).

Abstract: Torsion-free covers exist for abelian groups (see [1]). The coGalois group of automorphisms a torsion-free cover \phi: T \rightarrow A of an abelian group A is defined in [2] as the group of f: T \rightarrow T s.t. \phi f= \phi and is denoted by G(\phi). The abelian groups for which the coGalois group is trivial were characterized in [3]. The notion of coGalois group can be defined in any category where we have a covering class. In [4], coGalois groups have been studied in the category of representations of the quiver q_2 : \cdot \rightarrow \cdot . We talk about the existence and uniqueness of the torsion free-cover of an object in (q_n, Z-mod) (see [5]).

References:

[1] E. Enochs: Torsion-free covering modules. (1963).

[2] E. Enochs, J. R. Rozas and L. Oyonarte: Compact coGalois groups. (2000).

[3] E. Enochs and J. Rada: Abelian groups which have trivial absolute \\ coGalois group. (2005).

[4] Paul Hill, Abelian group pairs having a trivial coGalois Group. (2006).

[5] Molly Dunkum Wesley, Phd Thesis at The Graduate School University of Kentucky. (2005)