Name:

Sanz

First name:

Luis

E-mail:

lsanz@math.etsii.upm.es

Institution:

Dept. Matemáticas, E.T.S.I. Industriales,

Universidad Politécnica de Madrid

Address:

C/ Jose Gutiérrez Abascal, 2, 28006, Madrid, Spain

Fax:

34 91 336 3001

Phone:

34 91 336 31 02