Mandelbrot i l'atzar Authors Rosario Delgado de la Torre Maria Jolis Frederic Utzet Civit Abstract In this paper we analyze the contribution of Benoît Mandelbrot, considered the father of fractal geometry, to different applications of mathematics in areas where randomness appears, such as linguistics, hydrology, finance or teletraffic engineering. To this end we introduce some basic concepts and relationships of his work, developed over more than half a century, that are now part of the body of the general scientific knowledge. We focus mainly on the power law, self-similarity, long memory and heavy tails. We also present in some detail the fractional Brownian motion, which Mandelbrot popularized within the scientific community in a famous paper of 1968. The fractional Brownian motion is the simplest stochastic process that has the properties of self-similarity and long memory, thus being an ideal model in many situations. Downloads Text complet (Català) Published 2013-03-20 How to Cite Delgado de la Torre, R., Jolis, M., & Utzet Civit, F. (2013). Mandelbrot i l’atzar. Butlletí De La Societat Catalana De Matemàtiques, 27(2), 121–160. Retrieved from https://revistes.iec.cat/index.php/BSCM/article/view/79848.001 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX Issue Vol. 27 No. 2 (2012) Section Articles License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal Butlletí de la Societat Catalana de Matemàtiques, authors accept the following terms:Authors assign to Societat Catalana de Matemàtiques (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Butlletí de la Societat Catalana de Matemàtiques.Authors answer to Societat Catalana de Matemàtiques for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.Societat Catalana de Matemàtiques declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.The journal Butlletí de la Societat Catalana de Matemàtiques is not responsible for the ideas and opinions expressed by the authors of the published articles.