MOC
2002
14 years 12 days ago
2002
For a linear ordinary differential equation the Lie algebra of its infinitesimal Lie symmetries is compared with its differential Galois group. For this purpose an algebraic formul...
MOC
2000
14 years 15 days ago
2000
Consider a differential equation y = A(t, y)y, y(0) = y0 with y0 G and A : R+
COMBINATORICS
2006
14 years 23 days ago
2006
We associate one or two posets (which we call "semistandard posets") to any given irreducible representation of a rank two semisimple Lie algebra over C. Elsewhere we ha...
CSJM
2008
14 years 24 days ago
2008
In a present paper a problem of classification of Aff(2, R)orbits' dimensions is considered on example of an autonomous two-dimensional affine differential system of first or...
ITSL
2008
14 years 2 months ago
2008
We explicitly determine quasi-polynomials describing the weight multiplicities of the Lie algebra so5(C). This information entails immediate complete knowledge of the character of ...