2016
DOI: 10.3384/lic.diva-125136
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Group classification of linear Schrödinger equations by the algebraic method

Abstract: This thesis is devoted to the group classification of linear Schrödinger equations. The study of Lie symmetries of such equations was initiated more than 40 years ago using the classical Lie infinitesimal method for specific types of real-valued potentials. In first papers on this subject, most attention was paid to dynamical transformations, which necessarily change the time and space variables. This is why phase translations were missed. Later, the study of Lie symmetries was extended to nonlinear Schrödinge… Show more

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Cited by 1 publication
(2 citation statements)
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“…Each normalized class is semi-normalized in the same sense, and the converse is not in general true. There are also more sophisticated notions, uniform semi-normalization and weak uniform semi-normalization, which mediate the notion of normalization and semi-normalization [19,20].…”
Section: Algebraic Methods Of Group Classificationmentioning
confidence: 99%
See 1 more Smart Citation
“…Each normalized class is semi-normalized in the same sense, and the converse is not in general true. There are also more sophisticated notions, uniform semi-normalization and weak uniform semi-normalization, which mediate the notion of normalization and semi-normalization [19,20].…”
Section: Algebraic Methods Of Group Classificationmentioning
confidence: 99%
“…The further consideration partitions into five principal cases, depending on the value kκ and certain constraints for components of nonzeroν ∈ Nκ, I)ν 1ν3 = 0, II)ν 1 = 0,ν 3 = 0, III)ν 1 = 0, ν 2 = 0,ν 3 = 0, IV)ν 1 = 0,ν 2 = 0,ν 3 = 0 with kκ = 1 and V) kκ = 2. For each of these cases, we integrate the corresponding set of independent copies of the system (20) and thus derive the respective form ofκ parameterized by arbitrary constants. The relations (6b)-(6c) between κ andκ imply that the arbitrary-element tuple κ is of the same form asκ, but maybe with other values of parameter constants.…”
Section: Equations With Space-dependent Coefficientsmentioning
confidence: 99%