%0 Journal Article %T 2d Gravity with torsion, oriented matroids and 2+2 dimensions %A Nieto %A J.A. %A Le¨Žn %A E.A. %J Brazilian Journal of Physics %D 2010 %I Scientific Electronic Library Online %R 10.1590/S0103-97332010000400004 %X we find a link between oriented matroid theory and 2d gravity with torsion. our considerations may be useful in the context of noncommutative phase space in a target spacetime of signature (2+2) and in a possible theory of gravity ramification. %K 2d-gravity %K 2t physics %K 2+2 dimensions. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-97332010000400004&lng=en&nrm=iso&tlng=en