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math-ph2013
Wei-Norman equations for classical groups
Szymon Charzyński, Marek Kuś
We show that the non-linear autonomus Wei-Norman equations, expressing the solution of a linear system of non-autonomous equations on a Lie algebra, can be reduced to the hierarchy…
astro-ph.HE2013★ 19 cited
Long Gamma Ray Bursts from binary black holes
Agnieszka Janiuk, Szymon Charzyński, Michał Bejger
We consider a scenario for the longest duration gamma ray bursts, resulting from the collapse of a massive rotating star in a close binary system with a companion black hole. The p…
math.CA2013★ 16 cited
Wei-Norman equations for a unitary evolution
Szymon Charzyński, Marek Kuś
The Wei-Norman technique allows to express the solution of a system of linear non-autonomous differential equations in terms of product of exponentials. In particular it enables to…