A classification of 2-simple prehomogeneous vector spaces of type I
A classification of 2-simple prehomogeneous vector spaces of type I
复制标题
I型2-简预齐次向量空间的分类
DOI:
10.1016/0021-8693(88)90300-6
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发表时间:
1988
影响因子:
0.9
通讯作者:
Osami Yasukura
中科院分区:
文献类型:
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作者:
Tatsuo Kimura;S. Kasai;M. Inuzuka;Osami Yasukura
Let p: G+ GL (V) be a rational representation of a connected linear algebraic group G on a finite-dimensional vector space V, all defined over an algebraically closed field K of characteristic zero. If V has a Zariskidense G-orbit, we call a triplet (G, p, V) a prehomogeneous oector space (abbrev. PV). When p is irreducible, such PVs have been classified in [11. Since then, it has turned out gradually that the complete classification of reductive PVs (ie, PVs with reductive groups G) is an extremely laborious task. Therefore it is natural to classify some restricted class of PVs (eg,[2]) to get some insight into the general situation. A PV (G, p, V) is called a 2-simple PV when (1) G= GL (1)’x G, x G, with simple algebraic groups G, and Gz,(2) p is the composition of a rational representation p’of G, x G, of the form p’= p1 0 p’,+...+ PkOL&+(a,+...+ a,)@ l+ l@(z,+...+ t,) with k+ s+ t= l, where pi,(TV (resp. pi, T,) are nontrivial irreducible representations of G,(resp. G,), and the scalar multiplications GZ,(1)’on each irreducible component V, for i= 1,.... f, where V= I/,@...@ V,. We say that a 2-simple PV (G, p, V) is of type Zif k> l and at least one of (GL (l) xG, xG,, pi@ pi)(i= 1,.... k) is a nontrivial PV (see Definition 5, p. 43 in [11). On the other hand, if k> l and all (GL (l) xG, xG,, p, Op ()(i= l,..., k) are trivial PVs, it is called a 2-simple PV of type II. In [3], all 2-simple PVs of type II has been already classified. In this paper, we shall classify all 2-simple PVs of type I. Thus, together with [3], we complete a classification of all 2-simple PVs For example, the fact that all irreducible PVs are castling-equivalent to 2-simple PVs (or to (, X (m) x &Y (m) x G,!,(2),/1 1@/i I@ n 1) with m= 2, 3)(see [1]) indicates the importance of 2-simple PVs For simplicity, we write (G, p’, V) or (G, p’) instead of (G, p, V). 369
DOI:
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发表时间:
2007
期刊:
影响因子:
--
作者:
Tomoyoshi Ibukiyama;Hidenori Katsurada;Yumiko Hironaka;木村 達雄;Tatsuo Kimura;佐藤 文広;佐藤 文広;伊吹山 知義;Tomoyoshi Ibukiyama;佐藤 文広;佐藤 文広;Fumihiro Sato;広中 由美子;伊吹山 知義;Tomoyoshi Ibukiyama;広中 由美子;広中 由美子;Yumiko Hironaka;木村 達雄;Tatsuo Kimura
通讯作者:
Tatsuo Kimura
DOI:
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发表时间:
2020
期刊:
Algebraic number theory and related topics 2016, RIMS K\^{o}ky\^{u}roku Bessatsu
影响因子:
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作者:
駒場敦;城野悠志;中本和典;山崎愛一;A. Yukie
通讯作者:
A. Yukie