@article{CHAN_1991, title={A REMARK ON BOUNDEDNESS OF THE NUMERICAL RANGE}, volume={22}, url={https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4611}, DOI={10.5556/j.tkjm.22.1991.4611}, abstractNote={<div class="page" title="Page 1"> <div class="layoutArea"> <div class="column"> <p><span style="font-size: 10.000000pt; font-family: ’TimesNewRomanPSMT’;">It i</span><span style="font-size: 9.000000pt; font-family: ’TimesNewRomanPSMT’;">s shown that Chien’s result on the smallest rectangle wjth sjdes parallel to the axes containing the nwnerical range of a real matrix follows from a simple observation on complex matrices. A counter-example to Chien’s conjecture is also given. </span></p> </div> </div> </div>}, number={3}, journal={Tamkang Journal of Mathematics}, author={CHAN, CHI FAI}, year={1991}, month={Sep.}, pages={271–273} }