The dedication can still be found in a footnote on page 38, thanking Husserl for his guidance and generosity. Husserl, of course, had died three years earlier. In post-war editions of "Sein und Zeit" the dedication to Husserl is restored. The complex, troubled, and sundered philosophical relationship between Husserl and Heidegger has been widely discussed. On 4 May 1933, Professor Edmund Husserl addressed the recent regime change in Germany and its consequences:The future alone will judge which was the true Germany in 1933, and who were the true Germans—those who subscribe to the more or less materialistic-mythical racial prejudices of the day, or those Germans pure in heart and mind, heirs to the great Germans of the past whose tradition they revere and perpetuate.After his death, Husserl's manuscripts, amounting to approximately 40,000 pages of ""Gabelsberger"" stenography and his complete research library, were in 1939 smuggled to the Catholic University of Louvain in Belgium by the Franciscan priest Herman Van Breda. There they were deposited at Leuven to form the "Husserl-Archives" of the Higher Institute of Philosophy. Much of the material in his research manuscripts has since been published in the Husserliana critical edition series. In his first works Husserl tries to combine mathematics, psychology and philosophy with a main goal to provide a sound foundation for mathematics. He analyzes the psychological process needed to obtain the concept of number and then tries to build up a systematical theory on this analysis. To achieve this he uses several methods and concepts taken from his teachers. From Weierstrass he derives the idea that we generate the concept of number by counting a certain collection of objects. From Brentano and Stumpf he takes over the distinction between "proper" and "improper" presenting. In an example Husserl explains this in the following way: if you are standing in front of a house, you have a proper, direct presentation of that house, but if you are looking for it and ask for directions, then these directions (e.g. the house on the corner of this and that street) are an indirect, improper presentation. In other words, you can have a proper presentation of an object if it is actually present, and an improper (or symbolic, as he also calls it) one if you only can indicate that object through signs, symbols, etc. Husserl's "Logical Investigations" (1900–1901) is considered the starting point for the formal theory of wholes and their parts known as mereology.