Abstract
Let S⊂G(1,3)⊂p5 be a smooth, irreducible, non degenerate surface in the complex grassmannian G(1,3). Assume deg(S)=9, we show that S is one of the following surfaces:
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(a)
A K3 surface blown up in one point.
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(b)
The image of P2 by the linear system\(\left| {O_{P^2 } (6) - 2b_1 - \ldots - 2b_5 - b_6 - \ldots - b_{12} } \right|\)
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(c)
The image of P2 by the linear system\(\left| {O_{P^2 } (7) - 2b_1 - \ldots - 2b_{10} } \right|\).
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Verra, A. Smooth surfaces of degree 9 in G(1,3). Manuscripta Math 62, 417–435 (1988). https://doi.org/10.1007/BF01357719
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DOI: https://doi.org/10.1007/BF01357719