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A Recursive Method to Compute the Layers of a Stratified Graph
Nicolae Tandareanu

The concept of labeled stratified graph (shortly, stratified graph) was introduced in [10] and developed in [12]. Such a structure is a tuple of components uniquely determined by one of them. Among these components, the space L of labels is a subset of a Peano algebra and in [12] a method to construct this set is given. The set L is decomposed in disjoint subsets, which are named layers. In this paper we present a recursive method to obtain these layers, which gives a simple method to construct the set L. Finally we exemplify this method and we show that the case of an infinite set of layers can be encountered.

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