**Study and research stays**

- February
- March 2018 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - August
2017 -
**Universitas Indonesia**, Depok, Indonesia;**Institut Teknologi Bandung,**Indonesia. - July
2017 -
**The University of Newcastle**, Callaghan, Australia;**Universitas Pendidikan Ganesha**, Singaraja, Bali, Indonesia;**Hasanuddin University**, Makassar, Indonesia. - March
2017 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - July 2016 – AGH University of Science and Technology, Krakow, Poland.
- March
2016 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - September
– October 2015 -
**Institut Teknologi Bandung,**Indonesia**; Jember University,**Indonesia,**Hasanuddin University**, Makassar, Indonesia. - December
2014 -
**Kalasalingam University**, Anand Nagar, India;**SSN College of Engineering**, Chennai, India;**VIT University**, Chennai, India. - March
- April 2014 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - February
- March 2013 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - November
2012 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - July
2012-
**University of Indonesia,**Depok, Indonesia. - April
- May 2012 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - September
- October 2011 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - February
- March 2011 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - May
2010 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - March
2009 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - August
2008 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - April
2008 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - January
2008 -
*School of Science*,**Harbin Engineering University**, Harbin, China. - October
2007 -
*School of Mathematical Sciences, National Center for Mathematics*,**GC University**, Lahore, Pakistan. - February
2007 -
**Institut Teknologi Bandung,**Indonesia;*Faculty of Mathematics and Natural Sciences*,**University of Indonesia,**Jakarta, Indonesia**;***School of Information Technology and Mathematics Sciences*,**University of Ballarat**, Victoria, Australia. - March
- April 2006 -
*School of Information Technology and Mathematics Sciences*,**University of Ballarat**, Victoria, Australia.*Department of Computer Science and Software Engineering*,**The University of Newcastle**, Callaghan, Australia. - December
2004 -
*Department of Mathematics Education*,**Universitas Jember**, Jember, Indonesia.*Department of Mathematics,***Universitas Gadjah Mada***,*Yogyakarta, Indonesia. - November
2004 -
*School of Information Technology and Mathematics Sciences*,**University of Ballarat**, Victoria, Australia. - July
2004 -
*Departament de Matematica Aplicada IV*,**Universitat Politecnica de Catalunya**, Barcelona, Spain. - October
2003 -
*Department of Computer Science and Software Engineering*,**The University of Newcastle**, Callaghan, Australia. - September
2003 -
*Department of Mathematics*,**Institut Teknologi Bandung,**Indonesia. - July
2001 -
*Department of Mathematics*,**Institut Teknologi Bandung,**Indonesia. - June
2001 -
*Department of Computer Science and Software Engineering*,**The University of Newcastle**, Callaghan, Australia. - August
- September 2000 -
*Department of Computer Science and Software Engineering*,**The University of Newcastle**, Callaghan, Australia. - July
2000 -
*Department of Computer Science*,**Budapest University of Technology and Economics**, Budapest, Hungary. - September
- October 1999 -
*Department of Computer Science and Software Engineering*,**The University of Newcastle**, Callaghan, Australia. - July
1999 -
*Faculty of Applied Mathematics,***University of Mining and Metallurgy,**Krakow, Poland. - May
- June 1997 -
*Department of Computer Science and Information Theory*,**Technical University of Budapest**, Budapest, Hungary. - November
1989 -
*Section of Mathematics,***Bergakademia Freiburg,**Freiburg, Germany.