Physics of chiral symmetry breaking

This subsection of the "Modeling QCD" Workshop has included five talks. E. Shuryak spoke on "Recent Progress in Understanding Chiral Symmetry Breaking"; below it is split into two parts: (i) a mini-review of the field and (ii) a brief presentation of the status of the theory of interacting instantons. The next sections correspond to the following talks: (iii) K. Goeke et al., "Chiral Restoration and Medium Corrections to Nucleon in the NJL Model"; (iv) M. Takizawa and K. Kubodera, "Study of Meson Properties and Quark Condensates in the NJL Model with Instanton Effects"; (v) G. Klein and A. G. Williams, "Dynamical Chiral Symmetry Breaking in Dual QCD"; and (vi) R. D. Ball, "Skyrmions and Baryons.".