Scientific Events

**Ankara-Istanbul Algebraic Geometry & Number Theory Meetings****(occasional participant)**- Journees
Arithmetiques
**2019**will be held in Istanbul (inshallah) between 1-5 July 2019 - CIMPA School Geometry, groups and dynamics, 2018. Indian Institute of Science Education and Research, Mohali (Member of Scientific Committe & lecturer)
- IInd Turkish-Romanian meeting of mathematicians (Co-organizer, 18-22 October, 2017)
- Journees
Arithmetiques
**2017**3-7 July 2017, Caen, France (Participant) - International
Conference on the Evolution of Contemporary Mathematics and
its Impact on Sciences and Technology, Constantine,
Algeria, October 2017 (Member of Scientific Committe &
speaker)

- A special day on the occasion of the anniversary of the Feza Gürsey Institute, 28 April 2017 (invited speaker) SLIDES
- Antalya Algebra Days, Nesin Mathematics Village, May 18-22, İzmir (NOT Antalya), Turkey (Member of Scientific Committe)
- Rencontre autours de la fonction de Minkowski, 29-31 March 2017, Grenoble (invited speaker). SLIDES
- "Complex Affine Geometry, Effective Hyperbolicity, Analysis in honor of Mikhail Zaidenberg". October 24-28, 2016, Grenoble, France: SLIDES
- October 24-28, 2016, Grenoble, France: workshop on ”Complex Affine Geometry, Effective Hyperbolicity, Analysis in honor of Mikhail Zaidenberg”. Jimm, a fundamental involution.
- Marmara
Matematik Günleri, Istanbul, November 2016 Jimm, a fundamental involution SLIDES

- International Congress on Fundamental and Applied Sciences, Istanbul, August 2016. Jimm, a fundamental involution
- Arithmetic and Low Dimensional Hyperbolic Spaces 27 June 1 July 2016, Galatasaray University, Istanbul Jimm, a fundamental involution.
- Extended Differential Calculus: Diffeology Etc 29 June 1 July 2016, Galatasaray University, Istanbul Jimm, a fundamental involution.
- 97e rencontre entre mathmaticiens et physiciens théoriciens : Autour de Poincaré Strasbourg, June, 2016 Jimm, a fundamental involution.
- Seminaire IRMA, Strasbourg, January 29, 2016 Jimm, a fundamental involution.
- The First Romanian-Turkish Mathematics Colloquium, Ovidius University, Constanza, Romania A class of continued fraction maps. (October 2015).
- Ankara-Istanbul Algebraic Geometry & Number Theory Meetings Jimm, a fundamental involution 1-4. (2015)
- Mimar Sinan University, Istanbul, Turkey Jimm, a fundamental involution. (December 2014).
- Colloque “Statistique & Applications Avancés”, Constantine, Algeria (invited guest) (November 2014)
- İzmir Yüksek Teknoloji Enstitüsü, Mathematics Department. Jimm, a fundamental involution. (November 2014)
- Workshop on Model Theory and Groups at Istanbul Center for Mathematical Sciences, Istanbul, October 2014 (Invited Speaker)
- Nesin Mathematics Village, Şirince, İzmir. Actions of the Modular Group, lecture series
- Master Class : Around Thurston-Grothendieck-Teichmüller theories IRMA, May 9 17, 2014 Actions of the Modular Group
- Séminaire Georges Reeb d'Algebre et Géométrie Différentielle, Laboratoire de Mathématiques, Informatique et Applications, Université de Haute Alsace, May 12, 2014 C ̧ark Groupoids and Thompsons Groups.
- Istanbul Ticaret üniversitesi, Mathematics Department, April 2014, Modler Grup ve Etkileri Université Tebessa, Tebessa, Algeria (October 2013) Binary quadratic forms as dessins
- Conference on Finsler Geometry, Samos, Greece. (June 2013) Binary quadratic forms as dessins
- Middle East Technical University, Ankara, Turkey (May 2013) C ̧ ark Groupoids and Thompson Groups
- Commutative Algebra Research Group at King Fahd University of Petroleum and Minerals Dammam, Saudi Arabia (April 2013) Binary quadratic forms and the C ̧ark groupoid
- Haliç University, Istanbul, Turkey (April 2013) C ̧ark Groupoids and Thompson’s Groups
- Istanbul Number Theory Meetings, Istanbul Center for Mathematical Sciences, Turkey (February 2013) Binary Quadratic Forms as Dessins
- Institut de Recherche Mathématique Avancée, Strasbourg, France (January 2013) Binary Quadratic Forms as Dessins
- Yıldız Technical University, Istanbul, Turkey (March 2013) Euclid’s Algorithm, C ̧ arks and the Class Groupoid
- Conference on Teichmüller Theory Erwin Schrödinger Institute, Vienna (February 2013) Binary Quadratic Forms as Dessins
- Zirve University, Gaziantep, Turkey (December 2012) Binary Quadratic Forms as Dessins (December 2012) Euclid’s Algorithm, Çarks and the Class Groupoid
- Conference on Group Actions and Applications in Geometry, Topology and Analysis Kunming, China (July 2012) Binary Quadratic Forms as Dessins
- Mimar Sinan University, Istanbul, Turkey (April 2012) Euclids Algorithm, Çarks and the Class Groupoid
- Çukurova University, Adana, Turkey (March 2012) Euclid’s Algorithm, Çarks and the Class Groupoid
- Istanbul Technical University, Istanbul, Turkey (November 2011) Euclid’s Algorithm, Çarks and the Class Groupoid
- Institut de Recherche Mathématique Avancée, Strasbourg, France (June 2011) Hypergeometric Galois Actions I
- Izmir Algebraic Geometric Topology Days II (January 2011) Higher Mapping Class Groupoids
- Fatih University, Istanbul, Turkey (December 2010) The Groupoid of Orientation Twists and Triangulation Flips
- Number Theory, Arithmetic and Algebraic Geometry at Northern Cyprus (April 2010) Hypergeometry and Modularity
- Istanbul Technical University, Istanbul, Turkey (April 2010) Modular group, ribbons and solenoids
- Istanbul Bilgi University, Istanbul, Turkey (November 2009) Modular group, ribbons and solenoids
- Mimar Sinan University, Istanbul,
Turkey (October 2009) Hypergeometric
Galois Actions I-II

- International School and Conference on Foliations, Dynamical Systems, Singularity Theory and Perverse Sheaves Samarkand, Uzbekistan (October 2009) The Universal Arithmetic Curve
- 22nd National Mathematics Symposiom of the Turkish Mathematical Society, İzmir, Turkey (September 2009)
- Modular group, ribbons and solenoids (series of talks) Ankara Mathematics Days, Middle East Technical University, Ankara, Turkey (June 2009)
- The Universal Arithmetic Curve Antalya Algebra Days, Antalya, Turkey (May 2009) The Universal Arithmetic Curve
- Bilkent University, Ankara, Turkey (May 2009) Hypergeometric Galois Actions, Lattices and K3 surfaces
- Izmir Algebraic Geometric Topology Days, Izmir, Turkey (January 2009) Hypergeometric Galois Actions
- Middle East Technical University, Ankara, Turkey (November 2008) Hypergeometric Galois Actions
- Sabanci University, Istanbul, Turkey (November 2008) Hypergeometric Galois Actions Kyushu University, Fukuoka, Japan (April 2008) K3 Orbifolds
- Kyushu University, Fukuoka, Japan (April 2008) Discriminat varieties, branched covers and some odd things that I know about Fermat curves
- Tokyo University of Science, Tokyo, Japan (April 2008) Discriminat varieties, branched covers and some odd things that I know about Fermat curves
- Bilgi University, Istanbul, Turkey
(April 2008) K3
Orbifolds

- Humboldt University, Berlin, Germany (February 2007) A panorama of orbifolds in the complex geometry
- Ko ̧c University, Istanbul (November 2006) Orbifold Braid Groups
- Topology of Complex Algebraic Varieties, Alghero (September 2006) Topology of complex orbifolds
- CMI Summer School on Arithmetic Geometry, (August 2006) informal seminar on Covering relations among ball quotient orbifolds
- Erwin Schrodinger Institute, Vienna (May 2006) Classification of Calabi-Yau orbifolds
- Feza Gursey Institute, Istanbul, Turkey (March 2006) Finite abelian smooth uniformizations of projective spaces and Calabi-Yau orbifolds
- Humboldt University, Berlin, Germany (January 2006) Finite abelian smooth uniformizations of projective spaces and Calabi-Yau orbifolds
- Ecole Polytéchnique de Loz`ere, Séminaire Arthur L. Besse. Paris, France (October 2005) Covering relations among ball quotient orbifolds
- EMS Summer School Braid Groups and Related Topics-Applications to Geometry, Cryptography and Computation. Tiberias, Israel (September 2005) Uniformization of orbifolds and orbifold braid groups
- Modular Forms, Automorphic Forms and Related Moduli Spaces, Rome (September 2005) Calabi-Yau coverings of projective spaces
- Arithmetic and Geometry Around Hypergeometric Functions, CIMPA Summer School, Istanbul, Turkey (June 2005) Geometry of Complex Orbifolds
- Antalya Algebra Days, Antalya,
Turkey (May 2005): Calabi-Yau
orbifolds

- Yıldız Teknik University, Istanbul, Turkey (April 2005): Karmaşık eğri tekillikleri ve düğümler kuramı ile ilişkisi (Plane curve singularities and their connections with knot theory)
- Middle East Technical University, Ankara, Turkey (October 2004): Fundamental groups of plane curve complements
- Hannover University, Hannover, Germany (October 2004) Galois coverings of the plane by K3 surfaces
- Max Planck Institut, Bonn, Germany (July 2004) Coverings of projective spaces by products of discs
- Bosphorus University, Istanbul Turkey (May 2004) Braid groups of an orbifold
- Humboldt University, Berlin, Germany (January 2004) Coverings of projective spaces by products of discs and the braid groups of an orbifold
- Middle East Technical University, Ankara, Turkey (October 2003): Infinite towers of ballquotient orbifolds over the projective plane
- Max Planck Institute Bonn, Germany (September 2003): Orbifold geography in complex dimension 2 -ornon-abelian coverings of the projective plane
- Feza Gursey Institute, Istanbul, Turkey (March 2003): Uniformizing orbifolds over projective spaces and orbifold braid groups
- Balıkesir University, Balıkesir, Turkey (May 2002): Pürüzsüzlüğün girişim altında bozulması hakkında (On possible deterioration of Smoothness under convolution)
- Technion University, Haifa, Israel, (March 2001): Branched Galois self-coverings of projective plane
- Institut Joseph Fourier, Grenoble, France, (November 1999): Groupes abstraits, groupes fondamentaux. (Abstract groups, fundamental groups).
- Bilkent University, Ankara, Turkey (October 1998): On a Theorem of Mori.
- Rostov University, Rostov, Russian Federation “Conference on Analysis and Geometry”, (August 1998): On the existence of Green function and bounded harmonic functions.
- Institut Joseph Fourier, Grenoble, France, (May 1998): Th`eorie des fonctions sur les revˆetements des surfaces de Riemann, I-II. (Function theory on the covers of Riemann surfaces I-II).
- Institut Joseph Fourier, Grenoble, France (September 1997): Sur la détérioration de la lissité sous l’operation de convolution. (On deterioration of smoothness under the operation of convolution).