Учебник, New York: Clarendon Press, 1990. - 188 с.
Multiplication by X^u (Gauss contiguity).
Algebraic throry.
Variation of W_a with g.
Analytic theory.
Deformatic theoty.
Linear differential equations over a ring.
Multiplication by X^u (Gauss contiguity).
Algebraic throry.
Variation of W_a with g.
Analytic theory.
Deformatic theoty.
Linear differential equations over a ring.