SOME PROPERTIES OF CLEAR RINGS
DOI:
https://doi.org/10.25077/jmua.15.2.196-212.2026Keywords:
clean ring, clear ring, unit regular, unitAbstract
Let (R, +, ·) be a ring with unity. An element in R is called a clean
element if it is the sum of a unit element and an idempotent element. A ring R is called
a clean ring if all elements in R are clean elements. The notion of a clean element was
generalized to a clear element by replacing the idempotent element with a unit-regular
element. An element in R is called a clear element if it is the sum of a unit element
and a unit-regular element. A ring R is called a clear ring if all elements in R are clear
elements. In this paper, we study the new properties of clear elements in a ring and
clear properties in certain special rings, such as opposite rings, quotient rings, corner
rings, Morita rings, and group rings.
References
[1] Nicholson, W. K., 1977, Lifting idempotents and exchange rings, Transactions
of the American Mathematical Society, vol. 229: 1–26.
[2] Ashrafi, N., and Nasibi, E., 2013, r-clean rings, Math. Reports, vol. 15(65), no.
2: 125–132.
[3] Li, B., and Feng, L., 2010, f-clean rings and rings having many full elements,
Journal of the Korean Mathematical Society, vol. 47, no. 2: 247–261.
[4] Purkait, S., Dutta, T. K., and Kar, S., 2019, On m-clean and strongly m-clean
rings, Communications in Algebra.
[5] Zabavsky, B. V., Domsha, O. V., and Romaniv, O. M., 2021, Clear rings and
clear elements, Matematychni Studii, vol. 55, no. 1: 3–9.
[6] Malik, D. S., Mordeson, J. N., and Sen, M. K., 2007, Fundamentals of Abstract
Algebra. New York: The McGraw-Hill Companies.
[7] Ehrlich, G., 1968, Unit-regular rings, Portugaliae Mathematica, vol. 27, no. 4.
[8] Nicholson, W. K., 1973, Rings whose elements are quasi-regular or regular,
Archiv der Mathematik, vol. 9: 64–70.
[9] Lam, T. Y., 2003, Exercises in Classical Ring Theory, 2nd ed. New York:
Springer.
[10] Li, L., and Schein, B. M., 1985, Strongly regular rings, Semigroup Forum, vol.
32: 145–161.
[11] Agayev, N., Harmanci, A., and Halicioglu, S., 2010, On abelian rings, Turkish
Journal of Mathematics, vol. 34, no. 4: 465–474.
[12] Han, J., and Nicholson, W. K., 2001, Extensions of clean rings, Communications in Algebra, vol. 29, no. 6: 2589–2595.
[13] Mesyan, Z., 2010, The ideals of an ideal extension, Journal of Algebra and Its
Applications, vol. 9, no. 3: 407–431.
[14] McConnell, J. C., and Robson, J. C., 1987, Noncommutative Noetherian Rings.
Chichester: John Wiley & Sons.
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