<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31400596</termId><termName>magic squares</termName><termType>PT</termType><termNote><![CDATA[ Square arrays of integers arranged such that the sum of the integers in all rows, columns, and major diagonals add up to the same number; known for over 4000 years. ]]></termNote><termCreatedDate>2026-03-30 20:47:41</termCreatedDate><relation><relationType>UF</relationType><termId>31400597</termId><termName>magic square</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31400598</termId><termName>squares, magic</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31359471</termId><termName>word and number puzzles and games</termName><termType>PT</termType></relation></term>  </Zthes>