Results 131 to 140 of about 180 (160)

Identities of Regular Semigroup Rings

Semigroup Forum, 1998
The problem ``which semigroup rings are rings with identity'' was raised a long time ago. In [Semigroup Forum 46, No. 1, 27-31 (1993; Zbl 0787.16024)], in order to investigate the existence of identity of an orthodox semigroup ring, \textit{F. Li} asked: for a ring \(R\) with identity and a regular semigroup \(S\), if \(RS\) is a ring with identity, is
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Ring semigroups whose subsemigroups intersect

Semigroup Forum, 2009
A semigroup is called a ring semigroup if it is the multiplicative semigroup of some ring. For a ring semigroup \((S,\cdot)\) and an addition \(+\) such that \(T=(S,+,\cdot)\) is a ring, it is proved that every two nonzero subsemigroups of \(S\) intersect if and only if \(T\) is either a nil ring or an absolutely algebraic field of prime characteristic
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Semigroups and Semigroup Rings

2023
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Skew semigroup rings

1996
A ring means an associative ring. Let \(R\) be a ring, let \(S\) be a semigroup, and let \(S^*\) be the set of all nonzero elements of \(S\). Suppose \(\sigma:S^*\to\text{End }R\) is a mapping satisfying the condition: if \(a,b,ab\in S^*\) then \(\sigma(ab)=\sigma(a)\sigma(b)\). Using \(\sigma\), the authors define a skew semigroup ring of \(S\) over \(
G. ABRAMS, MENINI, Claudia
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Catalytic Enantioselective Ring-Opening Reactions of Cyclopropanes

Chemical Reviews, 2021
Vincent Pirenne, Bastian Muriel, Jerome Waser   +2 more
exaly  

C–C Bond Cleavages of Cyclopropenes: Operating for Selective Ring-Opening Reactions

Chemical Reviews, 2021
Ruben Vicente
exaly  

THE SEMIPRIMENESS OF SEMIGROUP RINGS

JP Journal of Algebra, Number Theory and Applications, 2021
Hirano, Yasuyuki, Solie, Brent, Tsutsui, Hisaya   +2 more
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Selective ring-opening of polycyclic to monocyclic aromatics: A data- and technology-oriented critical review

Progress in Energy and Combustion Science, 2023
Pedro Castaño
exaly  

Radical Ring-Opening Polymerization: Scope, Limitations, and Application to (Bio)Degradable Materials

Chemical Reviews, 2017
Julien Nicolas, Didier Gigmes, Catherine Lefay   +2 more
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Bacterial cell division: assembly, maintenance and disassembly of the Z ring

Nature Reviews Microbiology, 2009
Jeff Errington
exaly