Edición de la Akademie, por Benno Erdmann. Esta edición esta basada en la edición original B de 1787 y presenta las partes de la edición A que no coinciden con B en un volumen aparte (creo que el 4 de los Gesammelte Schriften). Impresa en caracteres góticos.

1. bd. Die alte welt. Das germanische mittelalter.--2.bd. Die neuzeit.

We give positive answers to two open questions from [15]. (1) For every set C countably determined over A, if C is Π 0 α (Σ 0 α ) then it must be Π 0 α (Σ 0 α ) over A, and (2) every Borel subset of the product of two internal sets X and Y all of whose vertical sections are Π 0 α (Σ 0 α ) can be represented as an intersection (union) of Borel sets with (...) vertical sections of lower Borel rank. We in fact show that (2) is a consequence of the analogous result in the case when X is a measurable space and Y a complete separable metric space (Polish space) which was proved by A. Louveau and that (1) is equivalent to the property shared by the inverse standard part map in Polish spaces of preserving almost all levels of the Borel hierarchy. (shrink)