Davide Bondoni

This short essay unfolds in two parts: the first proposes a biographical sketch of Schröder's life; the second aims to stress the meta-mathematical features in his "On the Formal Element of an Absolute Algebra (1874)". According to my opinion, in this context Schröder foresaw much naively not only Abstract Algebra, but also Group Theory, viewed in a structural setting.

This paper has been withdrawn by the author. In this article I review W\"ust's recent handbook on mathematical physics from a philosophical standpoint. It emerges a structural approach to mathematics which evidences the utility of logic in the expression of the main concepts of this discipline.

This paper has been withdrawn by the author. In this paper I present some reasons to adopt an holistic point of wiev, eliminating a boundary subject/object in the measurement. I review shortly Everett's and Cramer's positions, casting light on their flaws, to introduce a logical motivation to thinking to an experiment as a totality in which everything is entangled.

This paper has been withdrawn by the author. In this short paper I introduce a concept of possibility in order to vindicate Everett's Theory of many worlds. The main idea is that there is only one world: the real. After the wave-collapse, we have again only one world, but many possible worlds which have a different grade of possibility. In this sense 'possible' exclude the 'reality', opposing a long modal tradition.

This paper has been withdrawn by the author. In this short paper I present a new approach to the problem of measurement, based on the difference between language (reality) and meta-language (meta-reality). This way, it will be shown as the measurement is a meta-sentence on a real event. It is no longer necessary to split up the world into subject and object with a shifty boundary, but starting with an holistic event (the phenomenon) in which everything is entangled and make meta-assertion on this. This possible way out stops von Neumann's chain and explains the real meaning of the concept of measurement.

This paper has been withdrawn by the author. In this short paper I will put in evidence a problem nested in Ozawa's effort to block von Neumann's chains and in his attributing the wave-collapse to a interaction between systems. This suggests distinguishing sharply the mathematical world from the phenomenological one.

In this article I review W\"ust's recent handbook on mathematical physics from a philosophical standpoint. It emerges a structural approach to mathematics which evidences the utility of logic in the expression of the main concepts of this discipline.

In this short paper I present a new approach to the problem of measurement, based on the difference between language (reality) and meta-language (meta-reality). This way, it will be shown as the measurement is a meta-sentence on a real event. It is no longer necessary to split up the world into subject and object with a shifty boundary, but starting with an holistic event (the phenomenon) in which everything is entangled and make meta-assertion on this. This possible way out stops von Neumann's chain and explains the real meaning of the concept of measurement.

Aim of this paper is to expound the three definitions of individual laid down by Schröder in his Vorlesungen über die Algebra der Logik. We will argument that these definitions have something mereological in their formulations , assuming as given the existence of wholes from which they depend. For this reason a brief sketch on Leśniewski's mereology and Husserl's Fundierung is introduced.

In this short paper I present a new approach to the problem of measurement, based on the difference between language (reality) and metalanguage (meta-reality). This way, it will be shown that the measurement is a meta-sentence on a real event. It is no longer necessary to split up the world into subject and object with a shifty boundary, but starting with an holistic event (the phenomenon) in which everything is entangled, and make meta-assertions on this. This possible way out stops von Neumann's chain and explains the real meaning of the concept of measurement.

Aim of this paper is to confute two views, the first about Schröder's presump-tive foundationalism, according to he founded mathematics on the calculus of relatives; the second one mantaining that Schröder only in his last years (from 1890 onwards) focused on an universal and symbolic language (by him called pasigraphy). We will argue that, on the one hand Schröder considered the problem of founding mathematics already solved by Dedekind, limiting himself in a mere translation of the Chain Theory in the language of the relatives. On the other hand, we will show that Schröder's pasigraphy was connaturate to himself and that it roots in his very childhood and in his love for foreign languages.

This short essay unfolds in two parts: the first proposes a biographical sketch of Schröder's life; the second aims to stress the meta-mathematical features in his "On the Formal Element of an Absolute Algebra (1874)". According to my opinion, in this context Schröder foresaw much naively not only Abstract Algebra, but also Group Theory, viewed in a structural setting.