The higher rank numerical range is convex
2008 ◽
Vol 56
(1-2)
◽
pp. 65-67
◽
Keyword(s):
2012 ◽
Vol 389
(1)
◽
pp. 531-540
◽
2018 ◽
Vol 549
◽
pp. 256-275
◽
Keyword(s):
2009 ◽
Vol 57
(4)
◽
pp. 365-368
◽
2014 ◽
Vol 63
(3)
◽
pp. 439-454
◽