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MATHEMATICS
Canonical system of basic invariants for unitary group W(K5)
O. I. Rudnitskii Vernadsky Crimean
Federal University, Simferopol, Russian Federation
Abstract:
For a finite group G generated by reflections in the n-dimensional unitary space Un, the algebra IG of all G-invariant polynomials f(x1,…,xn) is generated by n algebraically independent
homogeneous polynomials fi∈IG with degfi=mi (i=¯1,n); m1⩽m2⩽⋯⩽mn (Shephard G. C., Todd J. A.).
According to Nakashima N., Terao H., and Tsujie S., system {f1,…,fn} of basic invariants of
the group G is said to be canonical if it satisfies the following system of partial differential equations:
¯fi(∂)fj=0,i,j=¯1,n (i<j),
where the differential operator ¯fi(∂) is obtained from polynomial fi if each its coefficient is replaced by the complex conjugate and each variable xk is replaced by ∂∂xk.
In the previous works, the author obtained in an explicit form canonical systems of basic invariants for all finite primitive unitary groups G generated by reflections in unitary spaces of dimensional 2, 3, and 4.
In this paper, canonical systems of basic invariants were constructed in an explicit form for
unitary groups W(K5) generated by reflections in space U5.
Keywords:
Unitary space, reflection, reflection groups, algebra of invariants, basic invariant, canonical system of basic invariants.
Received: 04.12.2018
Citation:
O. I. Rudnitskii, “Canonical system of basic invariants for unitary group W(K5)”, Vestn. Tomsk. Gos. Univ. Mat. Mekh., 2019, no. 58, 32–40
Linking options:
https://www.mathnet.ru/eng/vtgu697 https://www.mathnet.ru/eng/vtgu/y2019/i58/p32
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Abstract page: | 127 | Full-text PDF : | 44 | References: | 38 |
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