John Wilkes Booth, ti o je ara apa Guusu, ti o si ja fafa ninu isoro nipa isokan se eto lati fipa ji aare gbe ki o si mu fun awon Ologun isokan, titi di igba ti awon ariwa a fi gba lati pada si fifi elewo se pasipaaro.. 
Wọ́n sọọ́ lórúkọ Blagovest Sendov.Conction yìí sọ pé fún polynomial pẹ̀lú gbogbo àwọn  R1, ..., rn inú unit |z| Adz| < 1, ìkankan àwọn ń root tí Oyev wọn kò ju ẹyọ kan láti ojú kan.Àwọn ìtọ́kasí Gò G.. 