| Title:
             | 
On $E_k$-rings (English) | 
| Author:
             | 
Cherubini, Alessandra | 
| Author:
             | 
Varisco, Ada | 
| Language:
             | 
English | 
| Journal:
             | 
Czechoslovak Mathematical Journal | 
| ISSN:
             | 
0011-4642 (print) | 
| ISSN:
             | 
1572-9141 (online) | 
| Volume:
             | 
38 | 
| Issue:
             | 
3 | 
| Year:
             | 
1988 | 
| Pages:
             | 
456-463 | 
| . | 
| Category:
             | 
math | 
| . | 
| MSC:
             | 
16A99 | 
| idZBL:
             | 
Zbl 0673.16009 | 
| idMR:
             | 
MR950299 | 
| DOI:
             | 
10.21136/CMJ.1988.102241 | 
| . | 
| Date available:
             | 
2008-06-09T15:22:28Z | 
| Last updated:
             | 
2020-07-28 | 
| Stable URL:
             | 
http://hdl.handle.net/10338.dmlcz/102241 | 
| . | 
| Reference:
             | 
[1] Bell H. E.: On two commutativity properties for rings. II.Math. Japonica 27 (1982) 319-325. Zbl 0505.16014, MR 0663159 | 
| Reference:
             | 
[2] Chacron M.: On a theorem of Herstein.Canadian J. Math. 21 (1969) 1348-1353. Zbl 0213.04302, MR 0262295, 10.4153/CJM-1969-148-5 | 
| Reference:
             | 
[3] Cherubini A., A. Varisco: Sui semigruppi fortemente reversibili archimedei.Istituto Lombardo (Rend. Sc.) 110 (1976) 313-321. MR 0492018 | 
| Reference:
             | 
[4] Cherubini A., A. Varisco: On $E\sb{k}$-semigroups.Semigroup Forum 34 (1987) 305-319. MR 0880341 | 
| Reference:
             | 
[5] Mc Coy N. H.: Rings and ideals.Carus Monograph No. 8, Buffalo, N.Y., 1971. | 
| Reference:
             | 
[6] Mc Coy N. H.: The theory of rings.New York-London, 1973. | 
| Reference:
             | 
[7] Petrich M.: Introduction to semigroups.Merrill Books, Columbus, Ohio, 1973. Zbl 0321.20037, MR 0393206 | 
| Reference:
             | 
[8] Putcha M. S.: Band of $t$-archimedean semigroups.Semigroup Forum 6 (1973) 232-239. Zbl 0262.20070, MR 0374303, 10.1007/BF02389126 | 
| Reference:
             | 
[9] Putcha M. S.: Rings which are semilattices of archimedean semigroups.Semigroup Forum 22(1981) 331-337. Zbl 0469.20038, MR 0627139 | 
| Reference:
             | 
[10] Schwarz S.: The role of semigroups in the elementary theory of numbers.Math. Slovaca 31 (1981) 369-395. Zbl 0474.10002, MR 0637966 | 
| . |