Maude-help mailing list

[PATRICK BROWNE <patrick.browne AT dit.ie>]

I am trying represent the fact that exactly one named object exists (uniqueness quantifier) and some object exists (existential quantifier).

To do this, I am using constants within Maude's function modules (tight denotation) and theories (loose denotation).

Does the Maude code below capture the meaning of the following senetences?

There is one and only one Earth. On Earth there exists at least one country where people speak English.

fmod  PLANETS is

*** Uniqueness quantifier, there is one and only one Earth

sort Planet .

  op Earth : -> Planet .

endfm

fth COUNTRY is

  pr PLANETS .

  sort Country .

  ***  Existential quantifier, there is at least one English speaking country

  op EnglishSpeakingCountry : -> Country .

  op onEarth : Country Planet -> Bool .

  eq onEarth(EnglishSpeakingCountry,Earth) = true .

endfth

Thanks,

Pat

This email originated from DIT. If you received this email in error, please delete it from your system. Please note that if you are not the named addressee, disclosing, copying, distributing or taking any action based on the contents of this email or attachments is prohibited. www.dit.ie

Is ó ITBÁC a tháinig an ríomhphost seo. Má fuair tú an ríomhphost seo trí earráid, scrios de do chóras é le do thoil. Tabhair ar aird, mura tú an seolaí ainmnithe, go bhfuil dianchosc ar aon nochtadh, aon chóipeáil, aon dáileadh nó ar aon ghníomh a dhéanfar bunaithe ar an ábhar atá sa ríomhphost nó sna hiatáin seo. www.dit.ie

Tá ITBÁC ag aistriú go Gráinseach Ghormáin – DIT is on the move to Grangegorman