ELFT HÍRADÓ

["Varga Imre" <varga AT galilei.phy.bme.hu>]

                                                  MEGHIVO
                       a BME Fizikai Intezet es a Matematikai Intezet
                                              szeminariumara:


                                             Prof. Deepak Dhar
                    Tata Institute of Fundamental Research, Mumbay, India

        "Exact entropy of dimer coverings of lattices in three and
 more dimensions"



        Helye: BME Fizikai Intezet,
                  Budafoki ut 8.
                  F-epulet, III. lepcsohaz, mfszt. Szeminariumi szoba

        Ideje: 2008. junius 10. kedd, 14:00.

        Kivonat: In a classic paper, Kasteleyn, in 1961 showed that
the calculation of
        the number of dimer coverings of planar lattices can be
reduced to evaluating a
        determinant of an antisymmetric matrix. Since then, the two
dimensional problem
        has been studied extensively. However, for three and more
dimensions, only a few
        exact results are known. In this talk, I will deescribe the
constuction of a class of
        lattices in two and higher dimensions for which the number of
dimer coverings can
        be determined exactly using elementary arguments. These
lattices are a
        generalization of the two-dimensional Kagome lattice, and the
method also works
        for graphs without translational symmetry.


        Minden erdeklodot szivesen latunk.





                        Varga Imre