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- M. A. Chebotar, Wen-Fong Ke, Pjek-Hwee Lee
- 2004

For prime rings containing nontrivial idempotents, we describe the bijective additive maps which preserve zero products. Also, we describe the additive maps which behave like derivations when acting on zero products.

While investigating geometric and combinatorial properties of some incidence structures from planar nearrings, Clay introduced the notion of circularity in [ 2 ]. An example of a circular planar nearring is the planar nearring of the complex plane C with a new multiplication defined by a, b={O, if a=O; (a/lal)b, if a~0, for all a, b ~ C. The incidence… (More)

- Wen-Fong Ke
- 2003

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