Kyrchei, Ivan Determinantal representations of solutions to systems of two-sided quaternion matrix equations. (English) Zbl 07333185 Linear Multilinear Algebra 69, No. 4, 648-672 (2021). MSC: 15A09 15A15 15A24 15B33 PDF BibTeX XML Cite \textit{I. Kyrchei}, Linear Multilinear Algebra 69, No. 4, 648--672 (2021; Zbl 07333185) Full Text: DOI
Yuan, Shi-Fang; Tian, Yong; Li, Ming-Zhao On Hermitian solutions of the reduced biquaternion matrix equation \((AXB, CXD) = (E, G)\). (English) Zbl 07324431 Linear Multilinear Algebra 68, No. 7, 1355-1373 (2020). MSC: 65F05 65H10 15A33 PDF BibTeX XML Cite \textit{S.-F. Yuan} et al., Linear Multilinear Algebra 68, No. 7, 1355--1373 (2020; Zbl 07324431) Full Text: DOI
Wang, Hongxing; Liu, Xiaoji EP-nilpotent decomposition and its applications. (English) Zbl 1450.15006 Linear Multilinear Algebra 68, No. 8, 1682-1694 (2020). Reviewer: K. C. Sivakumar (Chennai) MSC: 15A09 15A23 15A24 06A06 PDF BibTeX XML Cite \textit{H. Wang} and \textit{X. Liu}, Linear Multilinear Algebra 68, No. 8, 1682--1694 (2020; Zbl 1450.15006) Full Text: DOI
Song, Guang-Jing; Yu, Shao-Wen Cramer’s rule for the general solution to a restricted system of quaternion matrix equations. (English) Zbl 1439.15006 Adv. Appl. Clifford Algebr. 29, No. 5, Paper No. 91, 17 p. (2019). Reviewer: Jaydeb Sarkar (Bangalore) MSC: 15A24 15A09 PDF BibTeX XML Cite \textit{G.-J. Song} and \textit{S.-W. Yu}, Adv. Appl. Clifford Algebr. 29, No. 5, Paper No. 91, 17 p. (2019; Zbl 1439.15006) Full Text: DOI
Song, Guangjing; Wang, Qingwen; Yu, Shaowen Cramer’s rule for a system of quaternion matrix equations with applications. (English) Zbl 1427.15019 Appl. Math. Comput. 336, 490-499 (2018). MSC: 15A24 15A09 PDF BibTeX XML Cite \textit{G. Song} et al., Appl. Math. Comput. 336, 490--499 (2018; Zbl 1427.15019) Full Text: DOI
Kyrchei, Ivan I. Determinantal representations of solutions and Hermitian solutions to some system of two-sided quaternion matrix equations. (English) Zbl 07029801 J. Math. 2018, Article ID 6294672, 12 p. (2018). MSC: 15 35 65 PDF BibTeX XML Cite \textit{I. I. Kyrchei}, J. Math. 2018, Article ID 6294672, 12 p. (2018; Zbl 07029801) Full Text: DOI
Ke, Yifen; Ma, Changfeng Alternating direction method for a class of Sylvester matrix equations with linear matrix inequality constraint. (English) Zbl 1392.65058 Numer. Funct. Anal. Optim. 39, No. 3, 257-275 (2018). MSC: 65F10 15A24 65F30 PDF BibTeX XML Cite \textit{Y. Ke} and \textit{C. Ma}, Numer. Funct. Anal. Optim. 39, No. 3, 257--275 (2018; Zbl 1392.65058) Full Text: DOI
Huang, Baohua; Ma, Changfeng Symmetric least squares solution of a class of Sylvester matrix equations via MINIRES algorithm. (English) Zbl 1373.93116 J. Franklin Inst. 354, No. 14, 6381-6404 (2017). MSC: 93B40 PDF BibTeX XML Cite \textit{B. Huang} and \textit{C. Ma}, J. Franklin Inst. 354, No. 14, 6381--6404 (2017; Zbl 1373.93116) Full Text: DOI
Farid, F. O.; He, Zhuo-Heng; Wang, Qing-Wen The consistency and the exact solutions to a system of matrix equations. (English) Zbl 1357.15007 Linear Multilinear Algebra 64, No. 11, 2133-2158 (2016). Reviewer: Andreas Arvanitoyeorgos (Patras) MSC: 15A24 15A09 15A03 PDF BibTeX XML Cite \textit{F. O. Farid} et al., Linear Multilinear Algebra 64, No. 11, 2133--2158 (2016; Zbl 1357.15007) Full Text: DOI
Dong, Chang-Zhou; Wang, Qing-Wen The \(\{P, Q, k + 1 \}\)-reflexive solution to system of matrix equations \(A X = C\), \(X B = D\). (English) Zbl 1393.15019 Math. Probl. Eng. 2015, Article ID 464385, 9 p. (2015). MSC: 15A24 65F30 PDF BibTeX XML Cite \textit{C.-Z. Dong} and \textit{Q.-W. Wang}, Math. Probl. Eng. 2015, Article ID 464385, 9 p. (2015; Zbl 1393.15019) Full Text: DOI
Huang, Na; Ma, Changfeng The iteration solution of matrix equation \(A X B = C\) subject to a linear matrix inequality constraint. (English) Zbl 07022914 Abstr. Appl. Anal. 2014, Article ID 705830, 9 p. (2014). MSC: 65 15 PDF BibTeX XML Cite \textit{N. Huang} and \textit{C. Ma}, Abstr. Appl. Anal. 2014, Article ID 705830, 9 p. (2014; Zbl 07022914) Full Text: DOI
Huang, Na; Ma, Changfeng The modified conjugate gradient methods for solving a class of generalized coupled Sylvester-transpose matrix equations. (English) Zbl 1350.65036 Comput. Math. Appl. 67, No. 8, 1545-1558 (2014). MSC: 65F30 65F10 15A24 PDF BibTeX XML Cite \textit{N. Huang} and \textit{C. Ma}, Comput. Math. Appl. 67, No. 8, 1545--1558 (2014; Zbl 1350.65036) Full Text: DOI
Bao, Yubao Least-norm and extremal ranks of the least square solution to the quaternion matrix equation \(AXB=C\) subject to two equations. (English) Zbl 1303.15018 Algebra Colloq. 21, No. 3, 449-460 (2014). Reviewer: Jorma K. Merikoski (Tampere) MSC: 15A24 15B33 PDF BibTeX XML Cite \textit{Y. Bao}, Algebra Colloq. 21, No. 3, 449--460 (2014; Zbl 1303.15018) Full Text: DOI
Li, Ning; Jiang, Jing; Song, Guang-Jing Ranks of submatrices in (skew-)Hermitian solutions to a quaternion matrix equation. (English) Zbl 1298.15021 J. Appl. Math. Comput. 42, No. 1-2, 19-40 (2013). Reviewer: John D. Dixon (Ottawa) MSC: 15A24 15A03 15A09 15B33 PDF BibTeX XML Cite \textit{N. Li} et al., J. Appl. Math. Comput. 42, No. 1--2, 19--40 (2013; Zbl 1298.15021) Full Text: DOI
Ramadan, Mohamed A.; El-Danaf, Talaat S.; Bayoumi, Ahmed M. E. Finite iterative algorithm for solving a complex of conjugate and transpose matrix equation. (English) Zbl 1295.65050 J. Discrete Math. 2013, Article ID 170263, 13 p. (2013). MSC: 65F30 65F10 15A24 PDF BibTeX XML Cite \textit{M. A. Ramadan} et al., J. Discrete Math. 2013, Article ID 170263, 13 p. (2013; Zbl 1295.65050) Full Text: DOI
Liu, Aijing; Chen, Guoliang; Zhang, Xiangyun A new method for the bisymmetric minimum norm solution of the consistent matrix equations \(A_1XB_1 = C_1\), \(A_2XB_2 = C_2\). (English) Zbl 1266.65070 J. Appl. Math. 2013, Article ID 125687, 6 p. (2013). MSC: 65F30 PDF BibTeX XML Cite \textit{A. Liu} et al., J. Appl. Math. 2013, Article ID 125687, 6 p. (2013; Zbl 1266.65070) Full Text: DOI
Li, Ying; Gao, Yan; Guo, Wenbin A Hermitian least squares solution of the matrix equation \(AXB=C\) subject to inequality restrictions. (English) Zbl 1268.15012 Comput. Math. Appl. 64, No. 6, 1752-1760 (2012). MSC: 15A24 15B57 PDF BibTeX XML Cite \textit{Y. Li} et al., Comput. Math. Appl. 64, No. 6, 1752--1760 (2012; Zbl 1268.15012) Full Text: DOI
Dong, Chang-Zhou; Wang, Qing-Wen; Zhang, Yu-Ping On the Hermitian \(R\)-conjugate solution of a system of matrix equations. (English) Zbl 1268.15008 J. Appl. Math. 2012, Article ID 398085, 14 p. (2012). MSC: 15A24 65F30 PDF BibTeX XML Cite \textit{C.-Z. Dong} et al., J. Appl. Math. 2012, Article ID 398085, 14 p. (2012; Zbl 1268.15008) Full Text: DOI
Chen, Deqin; Yin, Feng; Huang, Guang-Xin An iterative algorithm for the generalized reflexive solution of the matrix equations \(AXB = E, CXD = F\). (English) Zbl 1251.65046 J. Appl. Math. 2012, Article ID 492951, 20 p. (2012). MSC: 65F10 15A24 PDF BibTeX XML Cite \textit{D. Chen} et al., J. Appl. Math. 2012, Article ID 492951, 20 p. (2012; Zbl 1251.65046) Full Text: DOI
Wang, Qing-Wen; Zhou, Yan; Zhang, Qin Ranks of the common solution to six quaternion matrix equations. (English) Zbl 1304.15006 Acta Math. Appl. Sin., Engl. Ser. 27, No. 3, 443-462 (2011). MSC: 15A03 15A09 15A24 15B33 PDF BibTeX XML Cite \textit{Q.-W. Wang} et al., Acta Math. Appl. Sin., Engl. Ser. 27, No. 3, 443--462 (2011; Zbl 1304.15006) Full Text: DOI
Xiong, Zhiping; Qin, Yingying The common Re-nnd and Re-pd solutions to the matrix equations \(AX = C\) and \(XB = D\). (English) Zbl 1248.15015 Appl. Math. Comput. 218, No. 7, 3330-3337 (2011). Reviewer: Grozio Stanilov (Sofia) MSC: 15A24 PDF BibTeX XML Cite \textit{Z. Xiong} and \textit{Y. Qin}, Appl. Math. Comput. 218, No. 7, 3330--3337 (2011; Zbl 1248.15015) Full Text: DOI
Liang, Kaifu; Liu, Jianzhou Iterative algorithms for the minimum-norm solution and the least-squares solution of the linear matrix equations \(A_1XB_1 + C_1X^TD_1 = M_1, A_2XB_2 + C_2 X^TD_2 = M_2\). (English) Zbl 1250.65059 Appl. Math. Comput. 218, No. 7, 3166-3175 (2011). Reviewer: Liu Xinguo (Qingdao) MSC: 65F30 65F20 15A24 65F10 PDF BibTeX XML Cite \textit{K. Liang} and \textit{J. Liu}, Appl. Math. Comput. 218, No. 7, 3166--3175 (2011; Zbl 1250.65059) Full Text: DOI
Wang, Qing-Wen; Liu, Xin; Yu, Shao-Wen The common bisymmetric nonnegative definite solutions with extreme ranks and inertias to a pair of matrix equations. (English) Zbl 1267.15017 Appl. Math. Comput. 218, No. 6, 2761-2771 (2011). Reviewer: Yohannes Tadesse (Uppsala) MSC: 15A24 15B33 PDF BibTeX XML Cite \textit{Q.-W. Wang} et al., Appl. Math. Comput. 218, No. 6, 2761--2771 (2011; Zbl 1267.15017) Full Text: DOI
Wu, Ai-Guo; Lv, Lingling; Hou, Ming-Zhe Finite iterative algorithms for a common solution to a group of complex matrix equations. (English) Zbl 1229.65071 Appl. Math. Comput. 218, No. 4, 1191-1202 (2011). MSC: 65F30 65F10 15A24 PDF BibTeX XML Cite \textit{A.-G. Wu} et al., Appl. Math. Comput. 218, No. 4, 1191--1202 (2011; Zbl 1229.65071) Full Text: DOI
Liu, Xifu; Yang, Hu An expression of the general common least-squares solution to a pair of matrix equations with applications. (English) Zbl 1222.15021 Comput. Math. Appl. 61, No. 10, 3071-3078 (2011). MSC: 15A24 15A09 PDF BibTeX XML Cite \textit{X. Liu} and \textit{H. Yang}, Comput. Math. Appl. 61, No. 10, 3071--3078 (2011; Zbl 1222.15021) Full Text: DOI
Zhang, Qin; Wang, Qing-Wen The \((P,Q)\)-(skew)symmetric extremal rank solutions to a system of quaternion matrix equations. (English) Zbl 1222.15022 Appl. Math. Comput. 217, No. 22, 9286-9296 (2011). Reviewer: Juan Ramon Torregrosa Sanchez (Valencia) MSC: 15A24 15B33 15A09 PDF BibTeX XML Cite \textit{Q. Zhang} and \textit{Q.-W. Wang}, Appl. Math. Comput. 217, No. 22, 9286--9296 (2011; Zbl 1222.15022) Full Text: DOI
Guo, Wenbin; Huang, Tingzhu Extremal ranks of matrix expression of \(A - BXC\) with respect to Hermitian matrix. (English) Zbl 1204.15006 Appl. Math. Comput. 217, No. 6, 2381-2389 (2010). Reviewer: A. Arvanitoyeorgos (Patras) MSC: 15A03 15B57 15A09 15A18 PDF BibTeX XML Cite \textit{W. Guo} and \textit{T. Huang}, Appl. Math. Comput. 217, No. 6, 2381--2389 (2010; Zbl 1204.15006) Full Text: DOI
Ali Khan, Israr; Wang, Qing-Wen; Song, Guang-Jing Minimal ranks of some quaternion matrix expressions with applications. (English) Zbl 1204.15005 Appl. Math. Comput. 217, No. 5, 2031-2040 (2010). Reviewer: A. Arvanitoyeorgos (Patras) MSC: 15A03 15B33 15A24 PDF BibTeX XML Cite \textit{I. Ali Khan} et al., Appl. Math. Comput. 217, No. 5, 2031--2040 (2010; Zbl 1204.15005) Full Text: DOI
Cai, Jing; Chen, Guoliang; Liu, Qingbing An iterative method for the bisymmetric solutions of the consistent matrix equations \(A_{1}XB_{1}=C_{1}, A_{2}XB_{2}=C_{2}\). (English) Zbl 1202.65052 Int. J. Comput. Math. 87, No. 12, 2706-2715 (2010). MSC: 65F30 15A24 PDF BibTeX XML Cite \textit{J. Cai} et al., Int. J. Comput. Math. 87, No. 12, 2706--2715 (2010; Zbl 1202.65052) Full Text: DOI
Chang, Hai-Xia; Wang, Qing-Wen; Song, Guang-Jing (\(R,S\))-conjugate solution to a pair of linear matrix equations. (English) Zbl 1201.15006 Appl. Math. Comput. 217, No. 1, 73-82 (2010). Reviewer: Vladimir P. Kostov (Nice) MSC: 15A24 65F30 PDF BibTeX XML Cite \textit{H.-X. Chang} et al., Appl. Math. Comput. 217, No. 1, 73--82 (2010; Zbl 1201.15006) Full Text: DOI
Dehghan, Mehdi; Hajarian, Masoud The reflexive and anti-reflexive solutions of a linear matrix equation and systems of matrix equations. (English) Zbl 1198.15011 Rocky Mt. J. Math. 40, No. 3, 825-848 (2010). Reviewer: Mihail Voicu (Iaşi) MSC: 15A24 15A06 PDF BibTeX XML Cite \textit{M. Dehghan} and \textit{M. Hajarian}, Rocky Mt. J. Math. 40, No. 3, 825--848 (2010; Zbl 1198.15011) Full Text: DOI
Cai, Jing; Chen, Guoliang An iterative algorithm for the least squares bisymmetric solutions of the matrix equations \(A_{1}XB_{1}=C_{1},A_{2}XB_{2}=C_{2}\). (English) Zbl 1190.65061 Math. Comput. Modelling 50, No. 7-8, 1237-1244 (2009). Reviewer: Constantin Popa (Constanţa) MSC: 65F30 65F10 15A24 PDF BibTeX XML Cite \textit{J. Cai} and \textit{G. Chen}, Math. Comput. Modelling 50, No. 7--8, 1237--1244 (2009; Zbl 1190.65061) Full Text: DOI
Wang, Qingwen; Song, Guang Jing; Liu, Xin Maximal and minimal ranks of the common solution of some linear matrix equations over an arbitrary division ring with applications. (English) Zbl 1176.15020 Algebra Colloq. 16, No. 2, 293-308 (2009). Reviewer: Sheng Chen (Harbin) MSC: 15A24 15A03 15A09 15B33 PDF BibTeX XML Cite \textit{Q. Wang} et al., Algebra Colloq. 16, No. 2, 293--308 (2009; Zbl 1176.15020) Full Text: DOI
Wang, Qing-Wen; Li, Cheng-Kun Ranks and the least-norm of the general solution to a system of quaternion matrix equations. (English) Zbl 1158.15010 Linear Algebra Appl. 430, No. 5-6, 1626-1640 (2009). Reviewer: Vladimir P. Kostov (Nice) MSC: 15A24 15B33 15A09 15A03 PDF BibTeX XML Cite \textit{Q.-W. Wang} and \textit{C.-K. Li}, Linear Algebra Appl. 430, No. 5--6, 1626--1640 (2009; Zbl 1158.15010) Full Text: DOI
Yuan, Shifang; Liao, Anping; Lei, Yuan Least squares Hermitian solution of the matrix equation \((AXB,CXD)=(E,F)\) with the least norm over the skew field of quaternions. (English) Zbl 1145.15303 Math. Comput. Modelling 48, No. 1-2, 91-100 (2008). MSC: 15A24 15B33 PDF BibTeX XML Cite \textit{S. Yuan} et al., Math. Comput. Modelling 48, No. 1--2, 91--100 (2008; Zbl 1145.15303) Full Text: DOI
Liu, Yong Hui Ranks of least squares solutions of the matrix equation \(AXB=C\). (English) Zbl 1157.15014 Comput. Math. Appl. 55, No. 6, 1270-1278 (2008). Reviewer: Vladimir P. Kostov (Nice) MSC: 15A24 15A03 PDF BibTeX XML Cite \textit{Y. H. Liu}, Comput. Math. Appl. 55, No. 6, 1270--1278 (2008; Zbl 1157.15014) Full Text: DOI
Wang, Qing-Wen; Chang, Hai-Xia; Ning, Qun The common solution to six quaternion matrix equations with applications. (English) Zbl 1141.15016 Appl. Math. Comput. 198, No. 1, 209-226 (2008). Reviewer: Vladimir P. Kostov (Nice) MSC: 15A24 15B33 PDF BibTeX XML Cite \textit{Q.-W. Wang} et al., Appl. Math. Comput. 198, No. 1, 209--226 (2008; Zbl 1141.15016) Full Text: DOI
Yu, Shaowen; Wang, Qingwen Extremal ranks of the solution to a system of real quaternion matrix equations. (English) Zbl 1140.15311 J. Shanghai Univ. 11, No. 3, 229-232 (2007). MSC: 15A24 15A09 15B33 15A03 PDF BibTeX XML Cite \textit{S. Yu} and \textit{Q. Wang}, J. Shanghai Univ. 11, No. 3, 229--232 (2007; Zbl 1140.15311) Full Text: DOI
Sheng, Xingping; Chen, Guoliang A finite iterative method for solving a pair of linear matrix equations \((AXB,CXD)=(E,F)\). (English) Zbl 1133.65026 Appl. Math. Comput. 189, No. 2, 1350-1358 (2007). Reviewer: Liu Xinguo (Qingdao) MSC: 65F30 15A24 PDF BibTeX XML Cite \textit{X. Sheng} and \textit{G. Chen}, Appl. Math. Comput. 189, No. 2, 1350--1358 (2007; Zbl 1133.65026) Full Text: DOI
Liu, Yonghui; Tian, Yongee The extremal ranks of \(A_1-B_1XC_1\) subject to a pair of matrix equations. (English) Zbl 1167.15300 Rend. Semin. Mat. Univ. Padova 116, 55-69 (2006). MSC: 15A03 15A24 PDF BibTeX XML Cite \textit{Y. Liu} and \textit{Y. Tian}, Rend. Semin. Mat. Univ. Padova 116, 55--69 (2006; Zbl 1167.15300) Full Text: EuDML
Tian, Yongge; Takane, Yoshio On common generalized inverses of a pair of matrices. (English) Zbl 1116.15009 Linear Multilinear Algebra 54, No. 3, 195-209 (2006). Reviewer: Nestor Thome (Valencia) MSC: 15A09 15A03 PDF BibTeX XML Cite \textit{Y. Tian} and \textit{Y. Takane}, Linear Multilinear Algebra 54, No. 3, 195--209 (2006; Zbl 1116.15009) Full Text: DOI
Peng, Zhuo-Hua; Hu, Xi-Yan; Zhang, Lei An efficient algorithm for the least-squares reflexive solution of the matrix equation \(A_{1}XB_{1} = C_{1}, A_{2}XB_{2} = C_{2}\). (English) Zbl 1115.65048 Appl. Math. Comput. 181, No. 2, 988-999 (2006). Reviewer: Keehwan Kim (Kyongsan) MSC: 65F30 15A24 PDF BibTeX XML Cite \textit{Z.-H. Peng} et al., Appl. Math. Comput. 181, No. 2, 988--999 (2006; Zbl 1115.65048) Full Text: DOI
Wang, Qing-Wen The general solution to a system of real quaternion matrix equations. (English) Zbl 1138.15004 Comput. Math. Appl. 49, No. 5-6, 665-675 (2005). MSC: 15A24 15B33 PDF BibTeX XML Cite \textit{Q.-W. Wang}, Comput. Math. Appl. 49, No. 5--6, 665--675 (2005; Zbl 1138.15004) Full Text: DOI
Wang, Qingwen A system of matrix equations and a linear matrix equation over arbitrary regular rings with identity. (English) Zbl 1058.15015 Linear Algebra Appl. 384, 43-54 (2004). Reviewer: Vladimir P. Kostov (Nice) MSC: 15A24 15A06 15B33 16E50 15A09 PDF BibTeX XML Cite \textit{Q. Wang}, Linear Algebra Appl. 384, 43--54 (2004; Zbl 1058.15015) Full Text: DOI
Tian, Yongge Ranks of solutions of the matrix equation \(AXB=C\). (English) Zbl 1040.15003 Linear Multilinear Algebra 51, No. 2, 111-125 (2002). MSC: 15A03 15A09 15A24 PDF BibTeX XML Cite \textit{Y. Tian}, Linear Multilinear Algebra 51, No. 2, 111--125 (2002; Zbl 1040.15003) Full Text: DOI
Navarra, A.; Odell, P. L.; Young, D. M. A representation of the general common solution to the matrix equations \(A_1XB_1=C_1\) and \(A_2XB_2=C_2\) with applications. (English) Zbl 0983.15016 Comput. Math. Appl. 41, No. 7-8, 929-935 (2001). Reviewer: Václav Burjan (Praha) MSC: 15A24 PDF BibTeX XML Cite \textit{A. Navarra} et al., Comput. Math. Appl. 41, No. 7--8, 929--935 (2001; Zbl 0983.15016) Full Text: DOI
Tian, Yongge The solvability of two linear matrix equations. (English) Zbl 0970.15005 Linear Multilinear Algebra 48, No. 2, 123-147 (2000). Reviewer: Václav Burjan (Praha) MSC: 15A24 15A03 15A09 PDF BibTeX XML Cite \textit{Y. Tian}, Linear Multilinear Algebra 48, No. 2, 123--147 (2000; Zbl 0970.15005) Full Text: DOI
Mitra, Sujit Kumar; Prasad, K. Manjunatha The nonunique shorted matrix. (English) Zbl 0849.15015 Linear Algebra Appl. 237-238, 41-70 (1996). Reviewer: V.Burjan (Praha) MSC: 15B57 15A09 PDF BibTeX XML Cite \textit{S. K. Mitra} and \textit{K. M. Prasad}, Linear Algebra Appl. 237--238, 41--70 (1996; Zbl 0849.15015) Full Text: DOI
Blyumin, S. L.; Milovidov, S. P. Investigation and solution of a pair of linear matrix equations. (English. Russian original) Zbl 0840.15009 Math. Notes 57, No. 2, 211-213 (1995); translation from Mat. Zametki 57, No. 2, 300-303 (1995). Reviewer: N.I.Osetinski (Moskva) MSC: 15A24 15A09 PDF BibTeX XML Cite \textit{S. L. Blyumin} and \textit{S. P. Milovidov}, Math. Notes 57, No. 2, 211--213 (1995; Zbl 0840.15009); translation from Mat. Zametki 57, No. 2, 300--303 (1995) Full Text: DOI