06 9 v 1 2 3 D ec 1 99 1 PUPT - 1282 December 4 , 1991 Unitary And Hermitian Matrices In An External Field II
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چکیده
We give a simple derivation of the Virasoro constraints in the Kontsevich model, first derived by Witten. We generalize the method to a model of unitary matrices, for which we find a new set of Virasoro constraints. Finally we discuss the solution for symmetric matrices in an external field. ⋆ Research supported in part by NSF grant PHY90-21984 † E-mail: [email protected]; [email protected]
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تاریخ انتشار 1991