Abstract
W. H. Schikhof (1937–2014) is considered one of the founders of p-Adic Analysis and devoted his mathematical life to expand the frontiers of this area of knowledge. At the same time, he was a loyal friend and colleague, a concerned teacher and an affectionate family man. Many of us are thankful for the privilege of having been his friends and sharing his ideas. In this article we will shortly state some biographical facts. Then we will point out and discuss different areas in which his research was crucial. At the end we present a complete list of his books and published articles.
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References
W. H. Schikhof, Non-Archimedean Harmonic Analysis, Ph.D. Thesis, pp. 1–80 (Catholic Univ. of Nijmegen, The Netherlands, 1967).
A. C. M. van Rooij and W. H. Schikhof, “Non-Archimedean integration theory,” Indag. Math. 31, 190–199 (1969).
W. H. Schikhof, “Differentiation in non-Archimedean valued fields,” Indag. Math. 32, 35–44 (1970).
W. H. Schikhof, “Non-Archimedean representations of compact groups,” Compositio Math. 23, 215–232 (1971).
W. H. Schikhof, “A Radon-Nikodym theorem for non-Archimedean integrals and absolutely continuous measures on groups,” Indag. Math. 33, 78–85 (1971).
A. C. M. van Rooij and W. H. Schikhof, “Non-Archimedean analysis,” Nieuw Arch. Wisk. (3)19, 120–160 (1971).
A. C. M. van Rooij and W. H. Schikhof, “Non-Archimedean commutative C*-algebras,” Indag. Math. 35, 381–389 (1973).
A. C. M. van Rooij and W. H. Schikhof, Group Representations in non-Archimedean Banach Spaces, Table Ronde d’Analyse non Archimédienne (Paris, 1972), 329–340. Bull. Soc. Math. France, Mem. No. 39–40 (Soc. Math. France, Paris, 1974).
W. H. Schikhof, “The set of derivatives in a non-Archimedean field.” Math. Ann. 216, 67–70 (1975).
W. H. Schikhof, “Non-Archimedean invariant means,” Compositio Math. 30, 169–180 (1975).
W. H. Schikhof, “Non-Archimedean monotone functions,” Groupe d’étude d’Analyse Ultramétrique, 6 année, no. 13, 1–8 (1978/79).
W. H. Schikhof, “Non-Archimedean differentiation,” Proceedings of the sixth conference of Portuguese and Spanish mathematicians, Part I (Santander, Spain, 1979). Rev. Univ. Santander 2(1), 43–49 (1979).
W. H. Schikhof, “p-Adic monotone functions,” Symposium dedicated to A. F. Monna (Utrecht, The Netherlands, 1980), Commun. Math. Inst. Rijksuniv. Utrecht 12, 6–25 (1980).
W. H. Schikhof, “A note on finite rings,” Math. Nachr. 98, 121–122 (1980).
W. H. Schikhof, “C ∞-antiderivatives of p-Adic C ∞-functions,” Groupe d’étude d’Analyse Ultramétrique, 9 année, no. 3, 1–4 (1981/82).
A. C. M. van Rooij and W. H. Schikhof, A Second Course on Real Functions (Cambridge Univ. Press, Cambridge, 1982).
W. H. Schikhof, “Uniqueness of Banach algebra topology for a class of non-Archimedean algebras,” Indag. Math. 46, 47–49 (1984).
W. H. Schikhof, “Isometrical embeddings of ultrametric spaces into non-Archimedean valued fields,” Indag. Math. 46, 51–53 (1984).
W. H. Schikhof, Ultrametric Calculus. An Introduction to p-Adic Analysis, Second edition in 2006 (Cambridge Univ. Press, Cambridge, 1984).
W. H. Schikhof, “Locally convex spaces over nonspherically complete valued fields,” Groupe d’étude d’Analyse Ultramétrique, 12 année, no. 2, 1–33 (1984/85).
W. H. Schikhof, “A note on p-adic integration,” Comment. Math. Univ. St. Paul. 34, 49–50 (1985).
W. H. Schikhof, “Borel’s theorem for C ∞-functions on a non-Archimedean valued field,” Compositio Math. 55, 289–294 (1985).
W. H. Schikhof, “Orthogonality of p-adic characters,” Indag. Math. 48, 337–344 (1986).
W. H. Schikhof, “Locally convex spaces over nonspherically complete valued fields, I, II.,” Bull. Soc. Math. Belg. Sér. B 38, 187–207, 208–224 (1986).
Y. Morita and W. H. Schikhof, “Duality of projective limit spaces and inductive limit spaces over a nonspherically complete non-Archimedean field,” Tohoku Math. J. (2) 38, 387–397 (1986).
S. Caenepeel and W. H. Schikhof, “Two elementary proofs of Katsaras’ theorem on p-adic compactoids,” Proc. of the Conference on p-Adic Analysis (Hengelhoef, Belgium, 1986), pp. 41–44 (Free University of Brussels, Belgium, 1986).
W. H. Schikhof, “Compact-like sets in non-Archimedean Functional Analysis,” Proc. of the Conference on p-Adic Analysis (Hengelhoef, Belgium, 1986), pp. 137–147 (Free University of Brussels, Belgium, 1986).
G. Borm, W. H. Schikhof and H. de Vries, “p-Adic representative functions on abelian groups,” Indag. Math. 50, 9–13 (1988).
A. C. M. van Rooij and W. H. Schikhof, “On derivatives of functions defined on disconnected sets, I.,” Fund. Math. 131, 83–92 (1988).
W. H. Schikhof, “The continuous linear image of a p-adic compactoid,” Indag. Math. 51, 119–123 (1989).
W. H. Schikhof, “p-Adic nonconvex compactoids,” Indag. Math. 51, 339–342 (1989).
W. H. Schikhof, p-Adic almost periodic functions,” Indag. Math. (N.S.) 1, 127–133 (1990).
W. H. Schikhof, “The complementation property of ℓ ∞ in p-adic Banach spaces,” p-Adic Analysis (Proc. of the Conference on p-Adic Analysis, Trento, Italy, 1989), Lecture Notes in Math. 1454, 342–350 (Springer, Berlin, 1990).
W. H. Schikhof, “The p-adic bounded weak topologies,” Mathematical contributions in memory of Professor Victor Manuel Onieva Aleixandre. University of Cantabria, Spain (1991), 293–300.
W.H. Schikhof, “The p-adic Kreïn-Šmulian theorem,” Lecture Notes in Pure and Appl. Math. 137, 177–189 (M. Dekker, New York, 1992).
A. C. M. van Rooij and W. H. Schikhof, “Open problems,” Lecture Notes in Pure and Appl. Math. 137, 209–219 (M. Dekker, New York, 1992).
W. H. Schikhof, “Zero sequences in p-adic compactoids,” Lecture Notes in Pure and Appl. Math. 137, 227–236 (M. Dekker, New York, 1992).
N. De Grande-De Kimpe, C. Perez-Garcia and W. H. Schikhof, “Non-Archimedean t-frames and FMspaces,” Canad. Math. Bull. 35, 475–483 (1992).
C. Perez-Garcia and W. H. Schikhof, “The Orlicz-Pettis property in p-adic analysis,” Collect. Math. 43, 225–233 (1992).
W. H. Schikhof, “p-Adic numbers. Summer course 1993: the real numbers,” CWI Syllabi, 35, pp. 23–34 (Math. Centrum, Centrum Wisk. Inform., Amsterdam, 1993).
S. Borrey and W. H. Schikhof, “Weak and strong c′-compactness in non-Archimedean Banach spaces,” Simon Stevin 67, 55–58 (1993).
J. Araujo and W. H. Schikhof, “The Weierstrass-Stone approximation theorem for p-adic C n-functions,” Ann. Math. Blaise Pascal 1, 61–74 (1994).
C. Perez-Garcia and W. H. Schikhof, “Tensor product and p-adic vector valued continuous functions,” p-Adic Functional Analysis, Proc. of the Second Conference in p-Adic Functional Analysis, pp. 111–120 (Universidad de Santiago, Chile, 1994).
W. H. Schikhof, “The equalization of p-adic Banach spaces and compactoids,” p-Adic Functional Analysis, Proc. of the Second Conference in p-Adic Functional Analysis, pp. 129–149 (Universidad de Santiago, Chile, 1994).
C. Perez-Garcia and W. H. Schikhof, “Non-reflexive and non-spherically complete subspaces of the p-adic space ℓ ∞,” Indag. Math. (N.S.) 6, 121–127 (1995).
E. Beckenstein, L. Narici and W. H. Schikhof, “Compactification and compactoidification,” Ann. Math. Blaise Pascal 2, 43–50 (1995).
W. H. Schikhof, “Minimal-Hausdorff p-adic locally convex spaces,” Ann. Math. Blaise Pascal 2, 259–266 (1995).
W. H. Schikhof, “A scalar field for which c0 has no Hahn-Banach property,” Ann. Math. Blaise Pascal 2, 267–273 (1995).
W. H. Schikhof, “A perfect duality between p-adic Banach spaces and compactoids,” Indag. Math. (N.S.) 6, 325–339 (1995).
C. Perez-Garcia and W. H. Schikhof, “Finite-dimensional subspaces of the p-adic space ℓ ∞,” Canad. Math. Bull. 38, 360–365 (1995).
J. Kakol, C. Perez-Garcia and W. H. Schikhof, “Cardinality and Mackey topologies of non-Archimedean Banach and Fréchet spaces,” Bull. Polish Acad. Sci. Math. 44, 131–141 (1996).
T. Kiyosawa and W. H. Schikhof, “Non-Archimedean Eberlein-Šmulian theory,” Int. J. Math. Math. Sci. 19, 637–642 (1996).
E. Beckenstein, L. Narici and W. H. Schikhof, “Isometries between valued fields,” Lecture Notes in Pure and Appl. Math. 192, 29–38 (M. Dekker, New York, 1997).
N. De Grande-De Kimpe, J. Kakol, C. Perez-Garcia and W. H. Schikhof, “p-Adic locally convex inductive limits,” Lecture Notes in Pure and Appl. Math. 192, 159–222 (M. Dekker, New York, 1997).
S. Oortwijn and W. H. Schikhof, “Locally convex modules over the unit disk,” Lecture Notes in Pure and Appl. Math. 192, 305–326 (M. Dekker, New York, 1997).
H. Ochsenius and W. H. Schikhof, “Norm Hilbert spaces,” Bull. Polish Acad. Sci. Math. 46, 233–247 (1998).
C. Perez-Garcia and W. H. Schikhof, “p-Adic barrelledness and spaces of countable type,” Indian J. Pure Appl. Math. 29, 1099–1109 (1998).
G. Christol, Z. Mebkhout and W. H. Schikhof, “An application of c-compactness,” Lecture Notes in Pure and Appl. Math. 207, 39–44 (M. Dekker, New York, 1999).
H. Ochsenius and W. H. Schikhof, “Banach spaces over fields with an infinite rank valuation,” Lecture Notes in Pure and Appl. Math. 207, 233–293 (M. Dekker, New York, 1999).
C. Perez-Garcia and W. H. Schikhof, “The p-Adic Banach-Dieudonné theorem and semi-compact inductive limits,” Lecture Notes in Pure and Appl. Math. 207, 295–307 (M. Dekker, New York, 1999).
W. H. Schikhof, “p-Adic convex functions,” p-Adic Analysis, Summability Theory, Fuzzy Analysis and Applications (Proc. of the International Conference Held in Honor of Prof. M. S. Rangachari and Prof. G. Rangan, Chennai, India, 1998), J. Anal. 7, 103–115 (1999).
W. H. Schikhof and H. Ochsenius, “Linear homeomorphisms of non-classical Hilbert spaces,” Indag. Math. (N.S.) 10, 601–613 (1999).
H. Ochsenius and W. H. Schikhof, “Hilbert-like spaces over valued fields,” Proc. of the First Math. Meeting in Memory of Herbert Gross (Locarno, Switzerland, 1999), Note di Matematica e Fisica 10, 31–51 (1999).
N. De Grande-De Kimpe, J. Kakol, C. Perez-Garcia and W. H. Schikhof, “Orthogonal sequences in non-Archimedean locally convex spaces,” Indag. Math. (N.S.) 11, 187–195 (2000).
W. H. Schikhof, “Banach spaces over non-Archimedean valued fields,” Topology Proc. 24, 547–581 (2001).
W. H. Schikhof, “An approach to the ultrametric moment problem,” Circumspice, Various papers in and Around Mathematics in Honor of Arnoud van Rooij, pp. 141–148 (Catholic Univ. of Nijmegen, The Netherlands, 2001).
N. DeGrande-DeB Kimpe, J. Kakol, C. Perez-Garcia and W. H. Schikhof, “Orthogonal and Schauder bases in non-Archimedean locally convex spaces,” Lecture Notes in Pure and Appl. Math. 222, 103–126 (M. Dekker, New York, 2001).
H. Keller, H. Ochsenius and W. H. Schikhof, “On the commutation relation AB − BA = I for operators on non-classical Hilbert spaces,” Lecture Notes in Pure and Appl. Math. 222, 177–190 (M. Dekker, New York, 2001).
H. Keller and W. H. Schikhof, “Probability measures on non-Archimedean inner product spaces,” Lecture Notes in Pure and Appl. Math. 222, 191–201 (M. Dekker, New York, 2001).
C. Perez-Garcia and W. H. Schikhof, “An approximation theorem for p-adic linear forms,” Lecture Notes in Pure and Appl. Math. 222, 255–260 (M. Dekker, New York, 2001).
W. H. Schikhof, “Towards a p-adic Müntz theorem,” Bull. Belg. Math. Soc. Simon Stevin 9, 169–185 (2002).
N. De Grande-De Kimpe, J. Kakol, C. Perez-Garcia and W. H. Schikhof, “Weak bases in p-adic spaces,” Boll. Unione Mat. Ital. Sez. B Artic. Ric. Mat. (8) 5, 667–676 (2002).
H. Ochsenius and W. H. Schikhof, “Compact operators on non-classical Hilbert spaces,” Contemp. Math. 319, 239–249 (Amer. Math. Soc., Providence, RI, 2003).
C. Perez-Garcia and W. H. Schikhof, “Finite-dimensional orthocomplemented subspaces in p-adic normed spaces,” Contemp. Math. 319, 281–298 (Amer. Math. Soc., Providence, RI, 2003).
W. H. Schikhof, “An approach to the ultrametric moment problem,” Selected Topics of p-Adic Mathematical Physics and Analysis (Proc. of the First Conference on p-Adic Math. Physics,Moscow, Russia, 2003), Proc. Steklov Inst. Math. 245, 237–242 (2004).
H. Ochsenius and W. H. Schikhof, “Lipschitz operators on Banach spaces over Krull valued fields,” Contemp. Math. 384, 203–233 (Amer. Math. Soc., Providence, RI, 2005).
W. H. Schikhof, “p-Adic Choquet theory,” Contemp. Math. 384, 281–298 (Amer. Math. Soc., Providence, RI, 2005).
W. H. Schikhof, “Barrelledness of p-adic C1-function spaces,” p-Adic Mathematical Physics (Proc. of the Second Conference on p-Adic Math. Physics, Belgrade, Serbia, 2005), AIP Conf. Proc. 826, 280–290 (Amer. Inst. Phys., Melville, NY, 2006).
H. Ochsenius and W. H. Schikhof, “Norm Hilbert spaces over Krull valued fields,” Indag. Math. (N.S.) 17, 65–84 (2006).
H. Ochsenius and W. H. Schikhof, “Matrix characterizations of Lipschitz operators on Banach spaces over Krull valued fields,” Bull. Belg. Math. Soc. Simon Stevin 14, 193–212 (2007).
W. H. Schikhof, “Ultrametric C n-spaces of countable type,” Bull. Belg. Math. Soc. Simon Stevin 14, 993–1000 (2007).
H. Ochsenius and W. H. Schikhof, “On the algebraic dimension of Banach spaces over non-Archimedean valued fields of arbitrary rank,” Proyecciones 26, 237–244 (2007).
W.H. Schikhof, “An analyst encountering orthomodularity,” textit Proc. of the Second Mathematical Meeting in Memory of Herbert Gross, Note di Matematica e Fisica, Anno 22. 13, 3–12 (2009).
C. Perez-Garcia and W. H. Schikhof, Locally Convex Spaces Over non-Archimedean Valued Fields (Cambridge Univ. Press, Cambridge, 2010).
H. Ochsenius and W. H. Schikhof, “Compact perturbations of Fredholm operators on norm Hilbert spaces over Krull valued fields,” Contemp. Math. 508, 147–159 (Amer. Math. Soc., Providence, RI, 2010).
C. Perez-Garcia and W. H. Schikhof, “Tensor products of p-adic locally convex spaces having the strongest locally convex topology,” Contemp. Math. 508, 181–185 (Amer. Math. Soc., Providence, RI, 2010).
H. Ochsenius and W. H. Schikhof, “A new method for comparing two norm Hilbert spaces and their operators,” Indag. Math. (N.S.) 21, 112–126 (2011).
C. Perez-Garcia and W. H. Schikhof, “Remembering Nicole De Grande-De Kimpe 1936–2008,” Contemp. Math. 551, 1–32 (Amer. Math. Soc., Providence, RI, 2011).
E. Olivos and W. H. Schikhof, “Extending the multiplication of a totally ordered group to its completion,” Contemp. Math. 551, 231–242 (Amer. Math. Soc., Providence, RI, 2011).
C. Perez-Garcia and W. H. Schikhof, “New examples of non-Archimedean Banach spaces and applications,” Canad. Math. Bull. 55, 821–829 (2012).
E. Olivos and W. H. Schikhof, “Algebra and topology on the Dedekind completion of a totally ordered abelian group,” Indag. Math. (N.S.) 24, 291–304 (2013).
E. Olivos and W.H. Schikhof, “All proper multiplications on the completion of a totally ordered abelian group,” Contemp. Math. 596, 237–242 (Amer. Math. Soc., Providence, RI, 2013).
C. Perez-Garcia and W. H. Schikhof, “The metric approximation property in non-Archimedean normed spaces,” To be published in Glasnik Matematicki.
W. H. Schikhof and E. Olivos, “A note on Banach spaces over a rank 1 discretely valued field,” To be published in Contemp. Math.
H. Keller, “Ein nicht-klassischer Hilbertscher Raum,” Math. Z. 172, 41–49 (1980).
H. Ochsenius and E. Olivos, “On the value group and norms of a form Hilbert space,” Contemp. Math., 508, 133–146 (2010).
E. Olivos, “A family of totally ordered groups with some special properties,” Ann. Math. Blaise Pascal 12, 79–90 (2005).
E. Olivos, H. Soto and A. Mansilla, “A characterization of the Dedekind completion of a totally ordered group of infinite rank,” Indag. Math. (N.S.) 19(4), 633–641 (2008).
A. C. M. van Rooij, Non-Archimedean Functional Analysis (Marcel Dekker, New York, 1978).
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Ochsenius, H., Olivos, E. & Perez-Garcia, C. Remembering W. H. Schikhof. P-Adic Num Ultrametr Anal Appl 7, 81–95 (2015). https://doi.org/10.1134/S2070046615020016
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DOI: https://doi.org/10.1134/S2070046615020016