# Articles with primary mathematical subject classification: 52A20

## The concept of duality in convex analysis, and the characterization of the Legendre transform

Pages 661-674 by Shiri Artstein-Avidan, Vitali Milman | From volume 169-2

## A negative answer to Ulam’s Problem 19 from the Scottish Book

Pages 1111-1150 by Dmitry Ryabogin | From volume 195-3

## A classification of $\operatorname{SL}(n)$ invariant valuations

Pages 1219-1267 by Monika Ludwig, Matthias Reitzner | From volume 172-2