Generalization flocks of .
In this work, that is divided in two parts (Nota I and Nota II), we refine the classification of Lenz-Barlotti for the translation planes. In this first part we explicit the relation between congruences and spreads and we classify the translation planes of characteristic 2.
We classify the translation planes of characteristic different from 2 and we exhibit examples of planes of several classes.
In this paper we give a characterisation of the Galois spreads, which are defined in [5] for the construction of the indicator set.
In this paper we give a characterisation of the Galois spreads, which are defined in [5] for the construction of the indicator set.
We give a classification of the derivation sets of translation planes.
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