Volume 21, Issue 4 (2013)

---

On the Complexity of the Abelian Sandpile Model: Communication Complexity and Statistical Mechanics

J. Andres Montoya

A Glimpse of Complex Maps with Memory

Ramón Alonso-Sanz

On the Iota-Delta Function: Universality in Cellular Automata's Representation

Luan C. de S. M. Ozelim
André L. B. Cavalcante
Lucas P. de F. Borges

Initial-Condition Estimation in Network Synchronization Processes: Algebraic and Graphical Characterizations of the Estimator

Mengran Xue
Enoch Yeung
Anurag Rai
Sandip Roy
Yan Wan
Sean Warnick