<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31402759</termId><termName>digons</termName><termType>PT</termType><termNote><![CDATA[ In geometry, a digons are polygons with two sides or edges and two vertices; pairs of vertices connected by two edges. A digon is degenerate in a Euclidean space, but may be non-degenerate in a spherical space. ]]></termNote><termCreatedDate>2026-03-30 20:48:18</termCreatedDate><relation><relationType>UF</relationType><termId>31402760</termId><termName>digon</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31361605</termId><termName>polygons</termName><termType>PT</termType></relation></term>  </Zthes>