We will study a very weak notion of universality of functions in Sacks models. We will answer a question of Shelah and Steprans by showing that there are no (1,w_1)-weakly universal functions after adding uncountably many Sacks reals side by side.

Bio:

Osvaldo Guzman is a Mexican Mathematician. He did his Ph.D. in Mexico at UNAM under the supervision of Michael Hrusak. He is currently a postdoc at York University. His research focuses on infinite combinatorics, forcing, and cardinal invariants of the continuum.