The Principle of Equivalence as a Guide towards Matrix Theory   Compactifications
  The principle of equivalence is translated into the language of the world-volume field theories that define matrix and string theories. This idea leads to explore possible matrix descriptions of M-theory compactifications. An interesting case is the relationship between D=6 N=1 U(M) SYM and Matrix Theory on K3. 
Jes\'us Puente Pe\~nalba (U. of Oviedo)