From Virasoro constraints in Kontsevich's model to W constraints in asymmetric 2-matrix model
Marshakov A., Mironov A., Morozov A.
The Ward identities in Kontsevich-like 1-matrix models are used to prove at the level of discrete matrix models the suggestion of Gava and Narain's hypothesis, which relates the degree of the potential in the 2-matrix model to the form of the W constraints imposed on its partition function.