scholarly journals Relative Morse Index and Its Application to Hamiltonian Systems in the Presence of Symmetries

1995 ◽  
Vol 122 (2) ◽  
pp. 302-315 ◽  
Author(s):  
G.H. Fei
1985 ◽  
Vol 36 (4) ◽  
pp. 338-343 ◽  
Author(s):  
V. S. Bondarchuk

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