Epistemologia dell’insegnante di matematica sulla sua conoscenza professionale. (Parte IV: Risposte alle domande di ricerca D5-D9 e conclusioni).

[automatically translated] The first three parts of this work are found in the three previous issues of the magazine. In the first part it has been described the theoretical framework and was made a review of some research results on the topic in question. In the second part it was completed the review of the main research results were introduced the issues on which it has focused this research. In the third part it has been described the methodology used to investigate the teacher's math epistemology on his professional knowledge and have been reported and discussed some of the results obtained. In this fourth and final part will complete the description and discussion of the results obtained, we draw the conclusions of the research and brings a bibliography of the entire work.