Nonlinear algebraic systems with discontinuous terms
  Using a multiple critical points theorem for locally Lipschitz continuous functionals, we establish the existence of at least three distinct solutions for a parametric discrete differential inclusion problem involving a real symmetric and positive definite matrix. Applications to tridiagonal, fourth-order and partial difference inclusions are presented. 
Giovanni Molica Bisci and Du\v{s}an Repov\v{s}
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