- I.Kyrchei,
Quaternion core inverse and its generalizations,
11th International
Skorobohatko Mathematical Conference, Drohobych -
Lviv, Ukraine Octoder 26-30, 2020.
- I.Kyrchei,
Cramer’s rule for two-sided restricted quaternionic matrix equation,
The 12th International Algebraic Conference in Ukraine,
Vinnytsia, Ukraine, July 02-06, 2019.
- I.Kyrchei, Cramer's rule for the quaternion Sylvester matrix
equation,
International Conference
on Modern Problems of Mechanics and Mathematics,
dedicated to 90-th birth anniversary of
Yaroslav Stepanovych Pidstryhach, Academician of NASU
and 40-anniversary of the Institute for Applied
Problems of Mechanics and Mathematics of NASU, founded by him.
, L’viv, Ukraine, May 22 – 25, 2018.
- I.Kyrchei, Cramer’s rule for two-sided restricted quaternionic matrix equation.
The 11th International Algebraic Conference in Ukraine dedicated to the 75th anniversary of V.V. Kirichenko,
Kyiv, Ukraine, July 03-07, 2017.
- I.Kyrchei, Determinantal representations of the weighted Moore-Penrose inverse matrix over the quaternion skew field.
Algebra and Logic: Theory and Applications International
Conference dedicated to the 70th anniversary of V. M. Levchuk, Krasnoyarsk. Russia, July 24, 2016 – July 29, 2016
- I.Kyrchei,
Determinantal representation of the W-weighted Drazin inverse over the quaternion skew field,
X International Algebraic Conference in Ukraine dedicated to the 70th anniversary of Yu. A. Drozd, Ukraine,
Odessa, August 20–27, 2015
- I.Kyrchei,
Analogues of the adjugate matrix for the weighted Moore—Penrose inverse,
10th International Skorobohatko Mathematical Conference, Ukraine, Drogobych, August 25–28, 2015.
- Ivan Kyrchei.
Preface of the "Minisymposium on Theory and Application of Matrix Equations".
In: AIP Conference Proceedings of ICNAAM 2014 (Rhodes, 22–28 September 2014), vol. 1648, p.340001.
ISBN 978-0-7354-1287-3
- Ivan Kyrchei. Preface of the "Mini Symposium on Generalized Inverses and their Applications".
In: AIP Conference Proceedings of ICNAAM 2013 (Rhodes, 21–27 September 2013), vol. 1558, p. 1495.
ISBN 978-0-7354-1184-5
- I.Kyrchei.
Explicit Formulas for Determinantal Representations of the Drazin Inverse Solution of the Quaternion
Matrix Equation AXB = D. In: Abstracts of 9-th International Algebraic Conference in Ukraine, (L’viv, 8-13 July, 2013)- P. 108.
- I.Kyrchei
Determinantal representations of the Drazin inverse
matrix over a quaternion skew field, . In: Abstracts of International Conference on Algebra (ICA)
dedicated to 100th anniversary of S.M. Chernikov (Kyiv, 20-26 August, 2013)- P. 78.
- I.Kyrchei,
Explicit representation formulas for the least squares solutions of the quaternion matrix equation AXB=D. In: Abstracts of 8
th
International Algebraic Conference in
Ukraine (5-12 July,
2011, Lugansk)- P. 171.
- I.Kyrchei,
Cramer's rule for some two-sided quaternionic matrix equations. In: Abstracts of 7
th
International Algebraic Conference in
Ukraine (18-23 August,
2009, Kharkiv) – P. 82.
- Kyrchei I. Determinantal representation of the Moore-Penrose inverse matrix over quaternion skew field. In: Abstracts of 6
th
International Algebraic Conference in
Ukraine (1-7. 07. 2007, Kamyanets-Podilsky) – P. 120 – 121.
- Kyrchei I. Determinantal representation of the inverse matrix over the
quaternion skew field. In: Abstracts of 5
th
International Algebraic Conference in Ukraine
(20-27.06. 2005, Odessa) - P. 120.
- Kyrchei I.I. The least square solution of system of linear equations over
the quaternion skew field. In: Abstracts of International Algebraic Conference, (Ekaterinburg, 29.08. – 3.09. 2005)- P. 128-129.
- Kyrchei I.I. Generalization of Cramer's rule over a skew field. In: Abstracts of International Algebraic
Conference dedicated to the 250th anniversary of Moscow State University and the 75th anniversary
of the Department of Algebra, (Moscow, 26. 05 – 2.06 2004)- P.226-228.