Friedman and Schrittesser set out to answer a long-standing question regarding Lebesgue measurability and the Baire property, and how their behavior can differ with respect to sets in the projective hierarchy. Namely, they prove the theorem if ZF...Loe edasi...
In 1919 Emile Borel noted that countable sets of real numbers have a certain covering property, and speculated that only countable sets of real numbers have that property. Here, mathematicians explore the history and impact of the Borel conjectur...Loe edasi...
Woodin has been a leading figure in set theory since the early 1980s, and colleagues, former students, and other mathematicians wish him happy birthday with 12 papers on matters of interest to him. Their topics include the enumeration of degrees:...Loe edasi...
