**Mathematical Colloquium**

Mathematical Colloquium, which is held regularly on Thursdays at 2 p.m., is organised by the Department of Mathematics, University of Osijek, in co-operation with the Osijek Mathematical Society. Mathematical Colloquium was initiated in fall 1993, as an activity of the scientific section of the Osijek division of the Croatian Mathematical Society and the Institute for Applied Mathematics in Osijek with the help of the Society Head Office in Zagreb and the Department of Mathematics, University of Zagreb.

Lectures delivered at the Mathematical Colloquium are primarily intended for professors and students of the J.J.Strossmayer University of Osijek, as well as for high-school teachers and people from other fields of activity. Lecturers of the scientific part of the Colloquium are scientists employed at Croatian universities, but very often these are foreign scientists as well. Their lectures usually give results of their own research, or overviews of recent trends in various fields of mathematics and its applications.

Lecturers of the educational part of the Colloquium are teachers from Croatian universities. In addition to presenting their own ideas and approaches to teaching mathematics, they also present some interesting topics referring to the history of mathematics or famous mathematicians.

### Heads of the Mathematical Colloquium in Osijek:

- Z. Tomljanović (2017 - ),
- N. Truhar (2005 - 2016),
- M. Benšić (2000 – 2005),
- R. Scitovski (1994 – 2000),
- M. Crnjac (1993 – 1994).

Colloquium secretary: Danijel Grahovac

### Forthcoming lectures:

### Recent lectures:

#### Winter semester:

- September 07, 2017 (picture1, picture2, picture3)
**Peter Šemrl,**Department of Mathematics, University of Ljubljana, Ljubljana, Slovenia*Order isomorphisms of operator intervals*(abstract)

- October 19, 2017 (picture1, picture2, picture3)
**Prof.dr.sc. Hrvoje Kraljević,**Sveučilište u Zagrebu, Prirodoslovno-matematički fakultet, Matematički odsjek*K-struktura U(g)^K-modula U(g) za proste Liejeve algebre g=su(n,1) i g=so(n,1)*(abstract)

- October 25, 2017 (picture1, picture2, picture3)
**Izv.prof.dr.sc. Marianna Bolla,**Institute of Mathematics, Budapest University of Technology and Economics*Equivalences of generalized quasirandom properties of expanding graph sequences*(abstract)

- October 26, 2017 (picture1, picture2, picture3)
**Dr. sc. Siniša Franjić,***Computer Criminal Acts - What Would To Know About It Before They Happen*(abstract)

- November 09, 2017 (picture1, picture2, picture3)
**Izv.prof.dr.sc. Miroslav Pranić,**Faculty of Science, University of Banja Luka, Bosnia and Herzegovina*Gauss quadrature and look-ahead Lanczos algorithm*(abstract)

- November 16, 2017 (picture1, picture2, picture3)
**Prof.dr.sc. Miljenko Marušić,**Sveučilište u Zagrebu, Prirodoslovno-matematički fakultet, Matematički odsjek*Two notes on exponential model*(abstract)

- December 07, 2017 (picture1)
**Dr.sc. Goran Radunović,**Sveučilište u Zagrebu, Fakultet elektrotehnike i računarstva*A survey of Fractal Zeta Functions and Fractal drums*(abstract)