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VOLUME 31 (1980) | ISSUE 2 | PAGE 138
Interaction of instantons and anti-instantons in a nonlinear 0(3)σ model and a certain exactly solvable fermion theory
A two-component, two-dimensional fermion model, which has an exact solution, is proposed on the basis of calculation of the energy of interaction of the instantons and anti-instantons in the 0(3)σ model.