Karen Navasardyan graduated from the Faculty of Mathematics of Yerevan State University (YSU) in 1992. He got his Ph.D. in Mathematics from Yerevan State University in 1996. He is the author and co-author of more than 20 publications. In 2018 he defended his post-doctoral dissertation and was awarded the degree of Doctor of Physical and Mathematical Sciences.

Currently Karen teaches at Yerevan State University and AUA.

**Higher education**

**2018, Doctor of Physmath Sciences
**Yerevan State University,

**1996**, PhD in Mathematics

Yerevan State University

**1992**, MSc in Mathematics

Yerevan State University

**Courses taught:**

- Calculus 3
- Functional Analysis
- Real Analysis

**Publications:**

**Textbooks**

1. G. Gevorkian, L. Galstyan, A. Taslakyan, G. Mikaelyan, K. Navasardyan, Mathematical Analysis Problem Book, 2014, 4th Edition, Part I and II, YSU Printing House.

**Scientific papers**

- Gevorkyan G.G., Navasardyan K.A., On Uniqueness of Series by General Franklin System, Journal of Contemporary Mathematical Analysis, Vol. 53, No. 4, 2018, pp. 224-232.
- Navasardyan K.A., Uniqueness Theorems for Multiple Series by Vilenkin and Generalized Haar Systems, Armenian Journal of Mathematics, 2018, Vol. 10, No 6, pp. 1-15.
- Gevorkyan G.G., Navasardyan K.A., Uniqueness Theorems for Generalized Haar Systems, Mathematical Notes, 2018, Vol. 104, No. 1, pp. 10–21.
- Gevorkyan G.G., Navasardyan K.A., Uniqueness Theorems for Series by Vilenkin System, Journal of Contemporary Mathematical Analysis, Vol. 53, No. 2, 2018, pp. 61-72.
- Navasardyan K. A. On the Representation of Functions by Absolutely Convergent Series by H –system, Izv. Saratov Univ. (N. S.), Ser. Math. Mech. Inform., 2018, vol. 18, iss. 1, pp. 49–61 (in Russian)
- Navasardyan K.A., On a uniqueness theorem for the Franklin system, Proceedings of YSU, Math., 2018, v. 52, No 2, pp. 93-100.
- Navasardyan K. A., Uniqueness Theorems for Multiple Series with Respect to Vilenkin and Generalized Haar System. Reports of National Academy of Science of Armenia, 2017, v. 117, No 4, pp. 292-296.
- Navasardyan K.A., Uniqueness theorems for multiple Franklin series, Proceedings of YSU, Math., 2017, v. 51, N. 3, pp. 241-249.
- Gevorkyan G.G., Navasardyan K.A., On Haar Series of A-integrable Functions, Journal of Contemporary Mathematical Analysis, 2017, Vol. 52, No. 3, pp. 111-122.
- Gevorkyan G. G., Navasardyan K. A., On a summation method for Series with Respect to Vilenkin and Haar System. Reports of National Academy of Science of Armenia, 2017, v. 117, No 1, pp. 20-25.
- Gevorkyan G.G., Navasardyan K.A., On a summation method for Vilenkin and generalized Haar systems, Proceedings of YSU, Math., 2017, v. 51, N. 1, 13-17.
- Grigoryan M.G., Navasardyan K.A., Universal functions in “correction” problems guaranteeing the convergence of Fourier-Walsh series, Izvestiya: Mathematics, 2016, Vol. 80, No 6, pp. 1057-1083.
- Grigoryan M.G., Navasardyan K.A., On Behavior of Fourier Coefficients by Walsh System, Journal of Contemporary Mathematical Analysis, Vol. 51, No. 1, 2016, pp. 1-13.
- Navasardyan K.A.,On Series With Monotone Coefficients by Walsh System, Izvestia NAN Armenii, 42 (2007), 5, 62--78 (in Russian). English translation in: Journal of Contemporary Math. Analysis, 42, (2007), No. 5, pp 241-252.
- Navasardyan K.A., Stepanyan A. A., On Series in Haar’s System, Izvestia NAN Armenii, 42 (2007), 4, 53--66 (in Russian). English translation in: Journal of Contemporary Math. Analysis, 42, (2007), 4, 219--231.
- Navasardyan K.A. , Universal series by Walsh system, . Izvestia NAN Armenii, 37 (2002), 4, 45--62 (in Russian), English translation in: Journal of Contemporary Math. Analysis, 37 (2002), 4.
- Navasardyan K.A., Gevorkian G.G., On Walsh series with monotone coefficients. Izvestia RAN: Ser. Mat. 63 (1999), 1, 37-55.
- Navasardyan K.A., Universal series by multiple Walsh system Izvestia NAN Armenii, 30 (1995), 5, 22--40 (in Russian). English translation in: Journal of Contemporary Math. Analysis, 30 (1995), 5, 14--29.
- Navasardyan K.A., On null-series by double Walsh system. Izvestia NAN Armenii, 29 (1994), 1, 59--78 (in Russian). English translation in: Journal of Contemporary Math. Analysis, 29 (1994), 1, 50--68.
- Navasardyan K.A., On coefficients null-series and sets of uniqueness by double Walsh system, Dokladi NAN Armenii, 94 (1993), 4, 206 -- 209 (in Russian).

**Conference Papers**

- Navasardyan K.A., Uniqueness theorems for Vilenkin and generalized Haar systems, International Conference “Harmonic Analysis and approximations, VII”, 16-22 September, 2018, Tsaghkadzor, Armenia.
- Grigoryan M.G., Navasardyan K.A., Universal functions in a sense of modification with respect to Fourier coefficients, Sixth International Conference Harmonic Analysis and Approximations, 12 - 18 September, 2015, Tsaghkadzor, Armenia, p. 71.
- Navasardyan K.A., On Series with Monotone Coefficients by Walsh system, International Conference Harmonic Analysis and Approximations, IV, 19 – 26 September, 2008, Tsaghkadzor, Armenia, pp. 98-99.
- Navasardyan K.A. , Universal series by Walsh system with monotone coefficients, Proceedings of 12-th Saratov winter school, (2004), p.126.
- Navasardyan K.A., Gevorkian G.G., On Walsh series with monotone coefficients, International Conference Harmonic Analysis and Approximations, Nor Amberd, Armenia, September 18--25,(1998),p.20.

**Office location: **330W, PAB