A Cauchy-Goursat Problem for the generalized Eulera-Poisson-Darboux equation

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Akhmadjon K Urinov ◽  
Akhrorjon I Ismoilov ◽  
Azizbek O Mamanazarov
2004 ◽  
Vol 150 (2) ◽  
pp. 351-363
Author(s):  
Shu-Shiang Huang ◽  
Yenkun Huang ◽  
Che-Yuan Tsai
Keyword(s):  

1970 ◽  
Vol 23 (1) ◽  
pp. 89-102 ◽  
Author(s):  
A. Erdélyi
Keyword(s):  

2017 ◽  
Vol 2 (4) ◽  
pp. 272-280
Author(s):  
Valery Volchkov ◽  
◽  
Vitaly Volchkov ◽  
Keyword(s):  

1994 ◽  
Vol 135 ◽  
pp. 165-196 ◽  
Author(s):  
Masatake Miyake ◽  
Masafumi Yoshino

In the study of ordinary differential equations, Malgrange ([Ma]) and Ramis ([R1], [R2]) established index theorem in (formal) Gevrey spaces, and the notion of irregularity was nicely defined for the study of irregular points. In their studies, a Newton polygon has a great advantage to describe and understand the results in visual form. From this point of view, Miyake ([M2], [M3], [MH]) studied linear partial differential operators on (formal) Gevrey spaces and proved analogous results, and showed the validity of Newton polygon in the study of partial differential equations (see also [Yn]).


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