<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31342165</termId><termName>calculus</termName><termType>PT</termType><termNote><![CDATA[ A method of calculation and especially one of several highly systematic methods of treating problems by a special system of algebraic notations, as differential or integral calculus. ]]></termNote><termCreatedDate>2026-03-30 20:32:16</termCreatedDate><relation><relationType>BT</relationType><termId>31318497</termId><termName>mathematics</termName><termType>PT</termType></relation></term>  </Zthes>