Decision problem of some bundled FOML fragments

Mo Liu

Over increasing domain interpretations, \exists\Box and \forall\Box bundled fragments are decidable and over constant domain interpretations, \exists\Box bundled fragment is decidable while \forall\Box bundled fragment is undecidable. Based on the existing results,we show that over increasing domain interpretations, \Box\exists and \Box\forall bundled fragments are decidable as well. On the other hand, over constant domain interpretations, \Box\forall bundled fragment is undecidable and \Box\exists^2 bundled fragment, an extension of \Box\exists bundled fragment, is undecidable neither.

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