3 papers
math.AP2010
The reducibility Of An Airy Operator
Lotfi Saidane
We show that the determinant which seems to be not considered in the past, is not zero. As an application of this result we prove that the Setoyanagi operator $S_{p,…
math.CA2009
On the Levelt's theorem
Lotfi Saidane
Let be a homogeneous linear differential equation Fuchsian of order over . The idea of Riemann (1857) was to obtain the properties of solutio…
math.LO2003
Theorie De Galois Des Equations Differentielles
L. Saidane
Let k be a differential field and C its subfield of constants. In general a differential extension K of k add some new constants to C, and it is difficult to prove that C stay unch…