<inline-formula><alternatives><inline-graphic mime-subtype="png" xlink:href="S0004972720001227_inline1.png"/><tex-math><![CDATA[$\textit{h}$]]></tex-math></alternatives></inline-formula>-MINIMUM SPANNING LENGTHS AND AN EXTENSION TO BURNSIDE'S THEOREM ON IRREDUCIBILITY. Issue 1 (August 2021)