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 The unit ball of ${\mathcal L}(^2\mathbb{R}^2_{h(w)})$ Bull. Korean Math. Soc. 2017 Vol. 54, No. 2, 417-428 https://doi.org/10.4134/BKMS.b150851Published online March 31, 2017 Sung Guen Kim Kyungpook National University Abstract : We classify the extreme bilinear forms of the unit ball of the space of bilinear forms on $\mathbb{R}^2$ with hexagonal norms. Keywords : bilinear forms, extreme points, hexagonal norms on $\mathbb{R}^2$ MSC numbers : Primary 46A22 Downloads: Full-text PDF