Invited Talks

1. On power series rings over a nondiscrete valuation domain, Department seminar talk, University of Roma Tre, Rome, Italy, 2013. 4. 22.

2. Dimension theory of mixed polynomial and power series rings, Colloquium talk, Graz Technical University, Graz, Austria, 2012. 6. 22.

3. Catenarian property of mixed polynomial and power series rings over a pullback, Commutative Rings and their Modules 2012 (with a special session dedicated to Marco Fontana on occasion of his 65th birthday), June 4-8, 2012, Bressanone/Brixen, Italy.

4. Power series rings over a pullback, Department seminar talk, University of Roma Tre, Rome, Italy, 2012. 5. 21.

5. Dimension theory of mixed polynomial and power series rings, Colloquium talk, University of Tennessee, Knoxville, USA, 2012. 4. 27.

6. Catenarian property of mixed polynomial and power series rings over a pullback, A series of lectures, Algebra seminar talk, University of North Carolina, Charlotte, USA, 2011-2012.

7. Mixed polynomial and power series rings over a globalized pseudo-valuation domain, 2011 Pohang Conference on Commutative Rings and Algebras, May 23-28, 2011, Gyeongju, South Korea.

8. Rings of integer-valued polynomials and rational functions on a subset, Third International Meeting on Integer-Valued Polynomials and Problems in Commutative Algebra, 29/11/2010 - 3/12/2010, CIRM, Marseille, France.

9. Prime t-ideals in power series rings over a discrete valuation domain, 2009 Pohang Conference on Commutative Rings and Algebras, June 15-19, 2009, Gyeongju, South Korea.

10. On the cardinality of star operations on a seminormal conducive domain, Pre-ICM International Convention on Mathematical Sciences, University of Delhi, 18-20 December 2008.

11. Krull dimension of mixed extensions, POSTECH Math Colloquium, Pohang, Korea, 2008. 10. 10.

12. The catenarian property of power series rings over a Prfer domain, 2008 Commutative Algebra Conference, Ewha Womans University, Seoul, Korea, 2008. 6. 14.

13. On the Krull dimension of mixed extensions, 2008 KMS Spring Meeting, Invited Lecture in Algebra Session, Keimyung University, Daegu, Korea, 2008. 4. 26.

14. On the cardinality of star operations on a pseudo-valuation domain, Workshop on Commutative Rings and their Modules, Brixen, Italy, 2007. 9. 17 - 20.

15. On the integral closure of a graded Noetherian domain, International Conference on Abelian Groups and Modules over Commutative Rings, University of Connecticut, USA, 2007. 6. 11 - 6. 15.

16. On the integral closure of a graded Noetherian domain, NIMS Workshop on Commutative Algebra and Related Topics, National Institute for Mathematical Sciences, Daejeon, Korea, 2006. 11. 2 - 3.

17. t-SFT-rings and t-dimension of power series rings, The 3rd International Workshop for Korean Women in Mathematics, Korea University, Seoul, Korea, 2006. 6. 26 - 27.

18. A note on t-SFT-rings, Workshop on Commutative Rings, Cortona, Italy, 2006. 6. 4 - 6. 10.

19. On homogeneous overrings of a graded Noetherian domain, Algebra Seminar, Dipartimento di Matematica, Roma Tre, February 14, 2006.

20. Integral closure of graded integral domains, Special Session on Commutative

Rings and Monoids, AMS-MAA Joint Mathematics Meetings, San Antonio, TX, USA, January 12-15, 2006.

21. Polynomial closure in essential domains, Commutative Algebra Conference '05, Ewha Womans University, Seoul, Korea, 2005. 5. 28.

22. On the dimension theory of power series rings, The 1st International Workshop for Korean Women in Mathematics, KIAS, Seoul, Korea, 2004. 6. 21 - 23.

23. On the dimension theory of power series rings, Inha University Mathematics

Colloquium, Incheon, Korea, 2004. 6. 11.

24. Krull dimension in power series rings, Commutative rings and their modules,

Cortona, Italy, 2004. 5. 30 - 6. 5.

25. Semigroup rings over Strong Mori domains, Invited talk, Workshop on Commutative Algebra (Interactions with Algebraic Geometry), Konkuk University, Seoul, Korea, 2003. 6. 6 - 7.

26. Power series rings over Strong Mori domains, 2002 KMS Fall Meeting, Chonnam University, Gwangju, Korea, 2002. 10. 17 - 18.

27. Power series rings over Strong Mori domains, Commutative rings and Integer-valued polynomials AMS-UMI Joint Meeting, Pisa, Italy, 2002. 6. 12 - 16.

28. On overrings of Strong Mori domains, International Conference on Commutative Ring Theory, Inha University, Incheon, Korea, 2001. 5. 18 - 19.

29. Completion of a globalized pseudo-valuation domain, The 3rd Commutative

Algebra Conference, Seoul University, Seoul, Korea, 2000. 5. 27.

Conferences co-organized

1. 2011 Pohang Conference on Commutative Rings and Algebras, May 23-28, 2011, Gyeongju, Korea.

2. 2009 Pohang Conference on Commutative Rings and Algebras, June 15-19, 2009, Gyeongju, Korea.