scholarly journals Linear independence of the principal solutions at ∞ and −∞ for formally self-adjoint differential systems

1978 ◽  
Vol 29 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Calvin D Ahlbrandt
1988 ◽  
Vol 49 (C2) ◽  
pp. C2-389-C2-392 ◽  
Author(s):  
M. LE BERRE ◽  
E. RESSAYRE ◽  
A. TALLET ◽  
J. J. ZONDY
Keyword(s):  

2020 ◽  
Vol 64 (11) ◽  
pp. 11-22
Author(s):  
V. V. Amel’kin ◽  
V. Yu. Tyshchenko
Keyword(s):  

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