scholarly journals First approximation formulas in the problem of perturbation of definite and indefinite multipliers of linear Hamiltonian systems

Author(s):  
Марат Юмагулов ◽  
Лилия Ибрагимова ◽  
Anna Belova
2002 ◽  
Vol 44 (10-11) ◽  
pp. 1467-1477 ◽  
Author(s):  
Fanwei Meng ◽  
Yuangong Sun

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