Jorge Stolfi

His parents had immigrated to Brazil from the Veneto region of Italy only two years earlier, and so he spoke Venetian as his first language.

Among other results they developed the quad-edge data structure for two-dimensional maps,[4] the kinetic framework for computational geometry.

[7] In 1992 Jorge collected and widely disseminated (through the historic DEC gatekeeper ftp archives and Prime Time Freeware) a set of wordlists that later formed the basis of the ispell resources (later myspell, currently part of OpenOffice.org and Mozilla as hunspell).

After moving to UNICAMP, Jorge developed affine arithmetic, a model for self-validated computation (which he had conceived in 1991), in collaboration with Marcus Andrade, João Comba, and Luiz Figueiredo.

[8][9] At UNICAMP Jorge also worked with C. Lucchesi and T.Kowaltowski on finite state transducer technology for spell checking and other natural language processing tasks.

[18] In 2022, after posting to Twitter that "blockchain technology is a fraud", he inspired 1500 experts to write a letter to US Congress about the risks of cryptocurrencies.