Abstract
The article develops techniques for solving equations \(G(x,y)=0\), where \(G(x,y)=G(x_1,\ldots ,x_n,y)\) is a function in a given quasianalytic class (for example, a quasianalytic Denjoy–Carleman class, or the class of \({\mathcal C}^\infty \) functions definable in a polynomially-bounded o-minimal structure). We show that, if \(G(x,y)=0\) has a formal power series solution \(y=H(x)\) at some point a, then H is the Taylor expansion at a of a quasianalytic solution \(y=h(x)\), where h(x) is allowed to have a certain controlled loss of regularity, depending on G. Several important questions on quasianalytic functions, concerning division, factorization, Weierstrass preparation, etc., fall into the framework of this problem (or are closely related), and are also discussed.
Similar content being viewed by others
References
Acquistapace, F., Broglia, F., Bronshtein, M., Nicoara, A., Zobin, N.: Failure of the Weierstrass preparation theorem in quasi-analytic Denjoy–Carleman rings. Adv. Math. 258, 397–413 (2014)
I. Biborski, On the geometric and differential properties of closed sets definable in quasianalytic structures, preprint (2015). arXiv:1511.05071v1 [math.AG]
Bierstone, E., Milman, P.D.: Arc-analytic functions. Invent. Math. 101, 411–424 (1990)
Bierstone, E., Milman, P.D.: Relations among analytic functions, II. Ann. Inst. Fourier (Grenoble) 37(2), 49–77 (1987)
Bierstone, E., Milman, P.D.: Canonical desingularization in characteristic zero by blowing up the maximum strata of a local invariant. Invent. Math. 128, 207–302 (1997)
Bierstone, E., Milman, P.D.: Resolution of singularities in Denjoy–Carleman classes. Selecta Math. (N.S.) 10, 1–28 (2004)
Bierstone, E., Milman, P.D., Valette, G.: Arc-quasianalytic functions. Proc. Am. Math. Soc. 143, 3915–3925 (2015)
Borel, E.: Sur la généralisation du prolongement analytique. C. R. Acad. Sci. Paris 130, 1115–1118 (1900)
Carleman, T.: Les Fonctions Quasi-Analytiques. Collection Borel, Gauthier-Villars (1926)
Chaumat, J., Chollet, A.-M.: Division par un polynôme hyperbolique. Can. J. Math. 56, 1121–1144 (2004)
Childress, C.L.: Weierstrass division in quasianalytic local rings. Can. J. Math. 28, 938–953 (1976)
Cluckers, R., Lipshitz, L.: Strictly convergent analytic structures. J. Euro. Math. Soc. 19, 107–149 (2017)
Denjoy, A.: Sur les fonctions quasi-analytiques de variable reélle. C. R. Acad. Sci. Paris 173, 3120–1322 (1921)
Glaeser, G.: Fonctions composées différentiables. Ann. Math. 77, 193–209 (1963)
Grauert, H., Remmert, R.: Analytische Stellenalgebren, Grundlehren der Mathematischen Wissenschaften 176. Springer, Berlin (1971)
Hadamard, J.: Lectures on Cauchy’s Problem in Linear Partial Differential Equations. Yale Univ. Press, New Haven (1923)
Hörmander, L.: The Analysis of Linear Partial Differential Operators I. Springer, Berlin (1983)
Komatsu, H.: The implicit function theorem for ultradifferentiable mappings. Proc. Jpn. Acad. 55, 69–72 (1979)
Langenbruch, M.: Extension of ultradifferentiable functions. Manuscr. Math. 83, 123–143 (1994)
B. Malgrange, Ideals of differentiable functions, Tata Institute of Fundamental Research Studies in Math, vol. 3. Oxford University Press, London (1966)
Mandelbrojt, S.: Séries Adhérentes, Régularisation des Suites, Applications. Collection Borel, Gauthiers-Villars (1952)
Miller, C.: Infinite differentiability in polynomially bounded \(o\)-minimal structures. Proc. Am. Math. Soc. 123, 2551–2555 (1995)
Nazarov, F., Sodin, M., Volberg, A.: Lower bounds for quasianalytic functions. I. How to control smooth functions. Math. Scand. 95, 59–79 (2004)
Nowak, K.J.: A note on Bierstone-Milman-Pawłucki’s paper Composite differentiable functions. Ann. Polon. Math. 102, 293–299 (2011)
Nowak, K.J.: On division of quasianalytic function germs. Int. J. Math. 13, 1–5 (2013)
Nowak, K.J.: Quantifier elimination in quasianalytic structures via non-standard analysis. Ann. Polon. Math. 114, 235–267 (2015)
Rolin, J.-P., Speissegger, P., Wilkie, A.J.: Quasianalytic Denjoy–Carleman classes and o-minimality. J. Am. Math. Soc. 16, 751–777 (2003)
Roumieu, C.:Ultradistributions définies sur \({\rm R}^{\rm n}\) et sur certaines classes de variétés différentiables, J. Analyse Math. 10 (1962–63), 153–192
Thilliez, V.: On quasianalytic local rings. Expo. Math. 26, 1–23 (2008)
V. Thilliez, On the non-extendability of quasianalytic germs, preprint (2010). arXiv:1006.4171v1 [mathCA]
Author information
Authors and Affiliations
Corresponding author
Additional information
Research supported in part by NSERC Grant OGP0009070.
Rights and permissions
About this article
Cite this article
Belotto da Silva, A., Biborski, I. & Bierstone, E. Solutions of quasianalytic equations. Sel. Math. New Ser. 23, 2523–2552 (2017). https://doi.org/10.1007/s00029-017-0345-3
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00029-017-0345-3
Keywords
- Quasianalytic
- Denjoy–Carleman class
- Blowing up
- Power substitution
- Resolution of singularities
- Analytic continuation
- Weierstrass preparation