On the orders of directly indecomposable
✍
Paul Erdös; Péter P. Pálfy
📂
Article
📅
1999
🏛
Elsevier Science
🌐
English
⚖ 679 KB
We investigate the set of those integers n for which directly indecomposable groups of order n exist. For even n such groups are easily constructed. In contrast, we show that the density of the set of odd numbers with this property is zero. For each n we define a graph whose connected components des