Gevrey series of arithmetic type. II: Transcendence without transcendence. (Séries Gevrey de type arithmétique. II: Transcendance sans transcendance.) (French) Zbl 1037.11050

André, Yves

Ann. Math. (2) 151, No. 2, 741-756 (2000).

Summary: In this second part, we study the Diophantine properties of values of arithmetic Gevrey series of non-zero order at algebraic points. We rely on the fact, proved in the first part [ibid. 151, 705–740 (2000; Zbl 1037.11049)], that the minimal differential operator (with polynomial coefficients) which annihilates such a series has no non-trivial singularity outside the origin and infinity.
We show how to draw from this fact some transcendence properties and recover in particular the fundamental theorem of the Siegel-Shidlovsky theory on algebraic independence of values of \(E\)-functions. The paradox of the title points out the contrast between the qualitative aspect of this new argument and the essentially quantitative aspect of the traditional approach. Finally we discuss \(q\)-analogues of the theory (theta-functions, \(q\)-exponential,…).

MSC:

11J81	Transcendence (general theory)
34M99	Ordinary differential equations in the complex domain

Citations:

Zbl 1037.11049