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Remarks on the existence of minimal models of log canonical generalized pairs

  • Nikolaos Tsakanikas,
  • Lingyao Xie

摘要

Given an NQC log canonical generalized pair \((X,B+M)\) ( X , B + M ) whose underlying variety X is not necessarily \(\mathbb {Q}\) Q -factorial, we show that one may run a \((K_X+B+M)\) ( K X + B + M ) -MMP with scaling of an ample divisor which terminates, provided that \((X,B+M)\) ( X , B + M ) has a minimal model in a weaker sense or that \(K_X+B+M\) K X + B + M is not pseudo-effective. We also prove the existence of minimal models of pseudo-effective NQC log canonical generalized pairs under various additional assumptions, for instance when the boundary contains an ample divisor.