QUATERNIONIC CONTACT STRUCTURES
QUATERNIONIC CONTACT STRUCTURES
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四元接触结构
DOI:
10.1142/9789812810038_0003
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发表时间:
2001
期刊:
影响因子:
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通讯作者:
O. Biquard
中科院分区:
文献类型:
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作者:
O. Biquard
A contact structure on X2m+ 1 is a codimension 1 distribution V such that at each point x the nilpotent Lie algebra Vx⊕ TxX/Vx is isomorphic to the Heisenberg algebra. Similarly, a quaternionic contact structure on X4m+ 3 is concerned with a codimension 3 distribution V such that at each point x the nilpotent Lie algebra Vx⊕ TxX/Vx is isomorphic to the quaternionic Heisenberg algebra.There is an equivalent, more concrete, description of such distributions: there exists a 1-form η=(η1, η2, η3) with values in R3, such that V= kerη and the three 2-forms (dηi| V) are the fundamental 2-forms of a quaternionic structure on V: this means that there exists a metric γ on V such that