<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">arithmetic progressions</topic></authority><related type="broader"><topic>series</topic></related><variant type="other"><topic>arithmetic series</topic></variant><variant type="other"><topic>progressions, arithmetic</topic></variant><variant type="other"><topic>series, arithmetic</topic></variant> <note xml:lang="en"><![CDATA[ Sequences or series of mathematical objects or quantities, in which each entry is determined from its predecessors by some algorithm. ]]></note></mads>