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 The geometry of ${\mathcal L}_s(^3l_{\infty}^2)$ Commun. Korean Math. Soc. 2017 Vol. 32, No. 4, 991-997 https://doi.org/10.4134/CKMS.c170016Published online October 31, 2017 Sung Guen Kim Kyungpook National University Abstract : We classify the extreme, exposed and smooth symmetric 3-linear forms of the unit ball of ${\mathcal L}_s(^3l_{\infty}^2)$, respectively. Keywords : extreme points, exposed points, smooth points MSC numbers : Primary 46A22 Downloads: Full-text PDF