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  2. Recurrence relation - Wikipedia

    en.wikipedia.org/wiki/Recurrence_relation

    In mathematics, a recurrence relation is an equation according to which the th term of a sequence of numbers is equal to some combination of the previous terms. Often, only k {\displaystyle k} previous terms of the sequence appear in the equation, for a parameter k {\displaystyle k} that is independent of n {\displaystyle n} ; this number k ...

  3. Sword Verse - Wikipedia

    en.wikipedia.org/wiki/Sword_Verse

    The Sword Verse (Arabic: آية السيف, romanized: ayat as-sayf) is the fifth verse of the ninth surah of the Quran [1] [2] (also written as 9:5). It is a Quranic verse widely cited by critics of Islam to suggest the faith promotes violence against pagans (polytheists, mushrikun) by isolating the portion of the verse "kill the polytheists wherever you find them, capture them".

  4. Solution (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Solution_(chemistry)

    Making a saline water solution by dissolving table salt in water.The salt is the solute and the water the solvent. In chemistry, a solution is defined by IUPAC as "A liquid or solid phase containing more than one substance, when for convenience one (or more) substance, which is called the solvent, is treated differently from the other substances, which are called solutes.