D. R. Kaprekar
...that Indian schoolteacher D. R. Kaprekar discovered properties in number theory including a number and a constant named after him?
...that <a href="./India" id="mwFPM" rel="mw:WikiLink" title="India">Indian</a> schoolteacher <b id="mwFPQ"><a href="./D._R._Kaprekar" id="mwFPU" rel="mw:WikiLink" title="D. R. Kaprekar">D. R. Kaprekar</a></b> discovered  properties in <a href="./Number_theory" id="mwFPY" rel="mw:WikiLink" title="Number theory">number theory</a> including a <a href="./Kaprekar_number" id="mwFPc" rel="mw:WikiLink" title="Kaprekar number">number</a> and a <a class="mw-redirect" href="./Kaprekar_constant" id="mwFPg" rel="mw:WikiLink" title="Kaprekar constant">constant</a> named after him?