T. Sakai

activity

20002008

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2 papers · 1 filter

math.DG2008

Tight Lagrangian surfaces in $S^{2} \times S^{2}$

Hiroshi Iriyeh, Takashi Sakai

We determine all tight Lagrangian surfaces in $S^{2} \times S^{2}$ . In particular, globally tight Lagrangian surfaces in $S^{2} \times S^{2}$ are nothing but real forms.

math.DG2008

Orbits of s-representations with degenerate Gauss mappings

Osamu Ikawa, Takashi Sakai, Hiroyuki Tasaki

In this paper we study tangentially degeneracy of the orbits of s-representations in the sphere. We show that an orbit of an s-representation is tangentially degenerate if and only…

Tight Lagrangian surfaces in S2×S2

Orbits of s-representations with degenerate Gauss mappings

Tight Lagrangian surfaces in $S^{2} \times S^{2}$