Marcelo Viana

Marcelo Miranda Viana da Silva (born 4 March 1962) is a Brazilian mathematician working in dynamical systems theory.
He was a Guggenheim Fellow in 1993. He received the TWAS Prize in 1998 and in 2005 he was awarded the inaugural ICTP Ramanujan Prize for his research achievements.
Viana was vice-president of the International Mathematical Union in 2011–2014, and president of the Brazilian Mathematical Society (2013–2015).
In 1998, he was a plenary speaker at the International Congress of Mathematicians, in Berlin.
Viana is director elected of the IMPA (for the period 2016–2019).

Viana was born in Rio de Janeiro, Brazil, his parents being Portuguese immigrants. He grew up in Portugal, and his undergraduate studies where at the University of Porto. He received his Ph.D. from the IMPA in Rio de Janeiro, with Jacob Palis as advisor. He is now director at IMPA.

Viana's work concerns chaotic dynamical systems and strange attractors.

• jointly with AVILA, A., "Simplicity of Lyapunov spectra: proof of the Zorich–Kontsevich conjecture". Acta Mathematica. vol. 198 (2007), no. 1, pp. 1–56.
• jointly with PALIS, J., "High dimension diffeomorphisms displaying infinitely many periodic attractors". Annals of Mathematics. vol. 140 (1994), no. 1, pp. 207–250.
• jointly with MORA, L., "Abundance of strange attractors". Acta Mathematica. vol. 171 (1993), no. 1, pp. 1–71.