Semiprime

Known as: Semi-prime, Two-almost prime, Pq number

In mathematics, a semiprime (also called biprime or 2-almost prime, or pq number) is a natural number that is the product of two (not necessarily…

Papers overview

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2013

Abstract. Let $R$ be a semiprime ring with center $Z\left( R \right)$ . For $x,\,y\,\in \,R$ , we denote by $\left[ x,\,y \right…

2000

1997

The purpose of this paper is to investigate identities satisfied by centralizers on prime and semiprime rings. We prove the…

1997

Let $R$ be a prime ring with extended centroid $C$ and $\rho$ a nonzero right ideal of $R$. In this paper we investigate the…

1993

1988

1988

In a commutative f-ring, an 1-ideal I is called pseudoprime if ab = 0 implies a E I or b E I, and is called square dominated if…

1984

The title of this paper is meant to draw the reader's attention to the commonly held view that O.R. is a collection of techniques…

1978

A first-order theory is companionable if it is mutually model-consistent with a model-complete theory. The latter theory is then…

1957

A ring having no nonzero left annihilator will be called a faithful ring. Thus, if R is a faithful ring, aRlDO for every nonzero…