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  2. Perfect (grammar) - Wikipedia

    en.wikipedia.org/wiki/Perfect_(grammar)

    The word perfect in this sense means "completed" (from Latin perfectum, which is the perfect passive participle of the verb perficere "to complete"). In traditional Latin and Ancient Greek grammar, the perfect tense is a particular, conjugated-verb form.

  3. Completeness (logic) - Wikipedia

    en.wikipedia.org/wiki/Completeness_(logic)

    Semantic completeness is the converse of soundness for formal systems. A formal system is complete with respect to tautologousness or "semantically complete" when all its tautologies are theorems, whereas a formal system is "sound" when all theorems are tautologies (that is, they are semantically valid formulas: formulas that are true under every interpretation of the language of the system ...

  4. Completeness - Wikipedia

    en.wikipedia.org/wiki/Completeness

    Complete metric space, a metric space in which every Cauchy sequence converges; Complete uniform space, a uniform space where every Cauchy net in converges (or equivalently every Cauchy filter converges) Complete measure, a measure space where every subset of every null set is measurable; Completion (algebra), at an ideal; Completeness ...

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    The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

  6. Check mark - Wikipedia

    en.wikipedia.org/wiki/Check_mark

    The check or check mark (American English), checkmark (Philippine English), tickmark (Indian English) or tick (Australian, New Zealand and British English) [citation needed] is a mark ( , , etc.) used in many countries, including the English-speaking world, to indicate the concept "yes" (e.g. "yes; this has been verified", "yes; that is the ...

  7. Preterite - Wikipedia

    en.wikipedia.org/wiki/Preterite

    The preterite or preterit (/ ˈ p r ɛ t ər ɪ t / PRET-ər-it; abbreviated PRET or PRT) is a grammatical tense or verb form serving to denote events that took place or were completed in the past; in some languages, such as Spanish, French, and English, it is equivalent to the simple past tense.

  8. Gödel's completeness theorem - Wikipedia

    en.wikipedia.org/wiki/Gödel's_completeness_theorem

    To formally state, and then prove, the completeness theorem, it is necessary to also define a deductive system. A deductive system is called complete if every logically valid formula is the conclusion of some formal deduction, and the completeness theorem for a particular deductive system is the theorem that it is complete in this sense. Thus ...

  9. Future perfect - Wikipedia

    en.wikipedia.org/wiki/Future_perfect

    To form the future form of the auxiliary verbs, the future stem is used, and the endings -ai, -as, -a, -ons, -ez, -ont are added. Both avoir and être have irregular future stems, but with the exception of -re verbs, most verbs use the infinitive as the future stem ( je parler -ai , I will speak), the future stem of avoir "is" aur- , and the ...