Certain Results on the Logarithmic Order and Logarithmic Type for Entire Matrix Functions in Hyperspherical Region
DOI:
https://doi.org/10.22105/kmisj.v2i4.112Keywords:
Several complex matrices, Entire matrix functions, Hyperspherical region, Logarithmic order, Logarithmic typeAbstract
In this paper, we investigate the logarithmic growth of entire matrix functions of growth order zero. We show that the logarithmic order and the logarithmic type of entire functions in several complex matrix variables (FSCMVs) in hyperspherical regions. Examples are given to support the usability of our results.
Finally, a result concerning linear substitution of the logarithmic growth of FSCMVs is given.
References
Krantz, S. G. (2001). Function theory of several complex variables. American Mathematical Soc. https://people.math.har-
vard.edu/~demarco/Math274/Krantz_FunctionTheorySCV.pdf
Kumar Datta, S., & Biswas, T. (2016). Growth analysis of entire functions of two complex variables. Sahand communications in
mathematical analysis, 3(2), 13-24. https://dor.isc.ac/dor/20.1001.1.23225807.2016.03.2.2.7
Sheremeta, M. M. (2025). On the relative growth of entire functions of several complex variables. Journal of mathematical sci-
ences, 288(2), 247-256. https://doi.org/10.1007/s10958-025-07680-w
Abdalla, M. (2024). New aspects of certain special functions with applications. Karshi multidisciplinary international scientific
journal, 1(2), 115-148. https://doi.org/10.22105/kmisj.v1i1.51
Juneja, 0. P. (1970). On the coefficients of an entire series of finite order. Archiv der mathematik, 21(1), 374-378.
https://doi.org/10.1007/BF01220932
Kishka, Z. G., Saleem, M.A. & Abul-Dahab, M.A. On simple exponential sets of polynomials. Mediterranean journal of mathe-
matics. 11, 337–347 (2014). https://doi.org/10.1007/s00009-013-0296-7
Abdalla, M., & Kishka, Z. (2018). Exponential general sets of polynomials for several complex variables. Southeast asian bulletin
of mathematics, 42(6), p791. https://openurl.ebsco.com/EPDB%3Agcd%3A4%3A32892452/detailv2?sid=ebsco%3Aplink
%3Ascholar&id=ebsco%3Agcd%3A132701008&crl=c&link_origin=scholar.google.com
Datta, S. K., Biswas, T., & Dutta, D. (2016). Relative order concerning entire functions of several complex variables. Palestine
journal of mathematics, 5(1), 98-104. https://doi.org/10.14445/22315373/IJMTT-V46P534
Abdalla, M., & Abul-Ez, M. (2018). The growth of generalized Hadamard product of entire axially monogenic functions.
Hacettepe journal of mathematics and statistics, 47(5), 1231-1239. https://dergipark.org.tr/en/pub/hujms/article/471165 [10]Abdalla, M., Abul-Ez, M., & Al-Ahmadi, A. (2019). Further results on the inverse base of axially monogenic polynomials. Bul-
letin of the malaysian mathematical sciences society, 42(4), 1369-1381. https://doi.org/10.1007/s40840-017-0549-x
Abul-Ez, M., Abdalla, M., & Al-Ahmadi, A. (2020). On the representation of monogenic functions by the product bases of poly-
nomials. Filomat, 34(4), 1209-1222. https://doi.org/10.2298/FIL2004209A
El-Ajou, A. (2020). Taylor’s expansion for fractional matrix functions: Theory and applications. Journal of mathematics and
computer science, 21(1), 1-17. https://doi.org/10.22436/jmcs.021.01.01
Kishka, Z., & Abul-Dahab, M. (2015). On power series expansions of complex matrix functions. Asian journal of mathematics
and computer research, 3(3), 190-200. https://hal.science/hal-05451715
Abdalla, M. (2020). Special matrix functions: Characteristics, achievements and future directions. Linear and multilinear alge-
bra, 68(1), 1-28. https://doi.org/10.1080/03081087.2018.1497585
Kishka, Z., Abdalla, M., & Elrawy, A. (2018). A solution of system of linear matrix equations by matrix of matrices. Sohag jour-
nal of sciences, (2), 9-17. http://dx.doi.org/10.18576/sjs/030201
Kishka, Z., Abul-Ez, M., Saleem, M., & Abd-Elmaged, H. (2012). On the order and type of entire matrix functions in
complete Reinhardt domain. Journal of modern methods in numerical mathematics, 3(1), 31-41. https://doi.org/10.20454/jmmnm.2012.112
Abul-Ez, M., Abd-Elmageed, H., Hidan, M., & Abdalla, M. (2020). On the growth order and growth type of entire func-
tions of several complex matrices. Journal of function spaces, 2020(1), 4027529. https://doi.org/10.1155/2020/4027529
Iyer, V. G. (1942). A property of the maximum modulus of integral functions. Journal of the Indian mathematical soci -
ety (new series), 6, 69-80. https://informaticsjournals.co.in/index.php/jims/issue/view/1483
Juneja, P, O. (1965), Some properties of entire functions [Thesis].
Awasthi, N. K. (1969). A study in the mean values and the growth of entire functions [Thesis].
Metwally, M. (1993). Some topics in comlex analysis and its applications in basic sets of polynomials [Thesis].