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Bedos, Eric Christophe & Conti, Roberto
(2020).
Corrigendum to “Fourier theory and C*-algebras” [J. Geom. Phys. 105 (2016) 2–24].
Journal of Geometry and Physics.
ISSN 0393-0440.
150.
doi:
10.1016/j.geomphys.2020.103609.
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Bedos, Erik Christopher
(2017).
On Exel-Pardo algebras as C*-algebras associated with left cancellative small categories.
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Bedos, Erik Christopher
(2016).
Negative definite functions and C*-dynamical systems.
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Bedos, Erik Christopher
(2015).
On the Fourier-Stieltjes algebra of a discrete C*-dynamical system.
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Bedos, Erik Christopher
(2014).
A review of "Amenable traces and Følner C*-algebras" by Ara, Pere; Lledó, Fernando in Expo. Math. 32 (2014), 161–177.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2014).
A review of "Uniqueness of uniform norm and C*-norm in Lp(G,w)" by Akbarbaglu, Ibrahim; Heydarpour, Majid; Maghsoudi, Saeid in Math. Slovaca 64 (2014), 411–422.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2014).
On maximal ideals in certain reduced twisted C*-crossed products.
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Bedos, Erik Christopher
(2013).
A review of "Every topologically amenable locally compact quantum group is amenable" by Zobeidi, Amin in Bull. Aust. Math. Soc. 87 (2013), no. 1, 149–151.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2013).
A review of "Property T** for C*-algebras" by Li, Dan, in Acta Math. Sin. (Engl. Ser.) 28 (2012), no. 9, 184–1850.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2013).
A review of "Classification of inductive limits of outer actions of R on approximate circle algebras" by Dean, Andrew J. in Canad. Math. Bull. 55 (2012), no. 1, 73–80.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2013).
On ideals of certain reduced crossed products.
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Bedos, Erik Christopher
(2013).
On equivariant representations of C*-dynamical systems.
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Bedos, Erik Christopher
(2012).
A review of "Poisson boundaries of discrete quantum groups" by R. Tomatsu in Noncommutative harmonic analysis with applications to probability II, 297–312, Banach Center Publ., 89, Polish Acad. Sci. Inst. Math., Warsaw, 2010.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2012).
A review of "Simplicity of C∗-algebras using unique eigenstates" by L.H. Mitchell and W.L. Paschke in J. Operator Theory 64 (2010), no. 2, 321–347.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2012).
A review of "Phase transition on the Toeplitz algebra of the affine semigroup over the natural numbers" by M. Laca and I. Raeburn in Adv. Math. 225 (2010), no. 2, 643–688.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2011).
On the regularity of C*-dynamical systems (based on joint work with R. Conti).
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Bedos, Erik Christopher
(2011).
On regularity of C*-dynamical systems (based on a joint work with R.Conti).
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Bedos, Erik Christopher
(2011).
A review of "The crossed product von Neumann algebras associated with SL2(R)" by W. Wu, and W. Yuan in Taiwanese J. Math. 14 (2010), no. 4, 1501–1515.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2011).
A review of Projective version of Stinespring type theorems" by T.-L. Costache in Bull. Math. Soc. Sci. Math. Roumanie (N.S.) 53(101) (2010), no. 2, 109–124.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2011).
A review of "Independence of group algebras" by R. Conti and J. Hamhalter in Math. Nachr. 283 (2010), no. 6, 818–827.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2011).
On Fourier series in reduced crossed products.
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Bedos, Erik Christopher
(2010).
A review of "Continuous and discrete flows on operator algebras" by B. Itzá-Ortiz in J. Aust. Math. Soc. 86 (2009), no. 2, 169–176.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2010).
A review of "Proper actions which are not saturated" by D. Marelli and I. Raeburn in Proc. Amer. Math. Soc. 137 (2009), no. 7, 2273–2283.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2009).
A review of "Characterizations of compact and discrete quantum groups through second duals" by Volker Runde in J. Operator Theory 60 (2008), no. 2, 415--428.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2009).
A review of "A note on the crossed product associated with PSL(2,R)" by WenMing W in. Sci. China Ser. A 51 (2008), no. 11, 2081--2088.
Mathematical Reviews.
ISSN 0025-5629.
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Bedos, Erik Christopher
(2008).
The full group C*-algebra of the modular group is primitive.
Show summary
Presentation of joint work with Tron Å. Omland
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Bedos, Erik Christopher
(2007).
Om RSA-kryptografi.
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Bedos, Erik Christopher
(2006).
Om Google og rangering av web-sider.
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Bedos, Erik Christopher
(2003).
Full rulle med sinus og cosinus - et lite Maple-show.
Show summary
En demonstrsjon av hvordan programpakken Maple enkelt kan brukes til å lage illustrajoner av sykloid-kurver og bulkede kuleflater, der funksjonene sinus og cosinus spiller en vesentlig rolle.
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Bedos, Erik Christopher
(2002).
Om approksimasjon av røtter til polynomer ved hjelp av linær algebra.
Show summary
Populært vitenskapelig foredrag om hvordan moderne programakker i
matematikk finner approksimasjon av røttene til et polynom ved hjelp av
metoder fra lineær algebra.
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Bedos, Erik Christopher
(2002).
A review of "Exactness of one relator groups" by Erik Guentner.
Mathematical Reviews.
ISSN 0025-5629.
Show summary
Dette er en anmeldelse av en artikkel publisert i Proc. Amer. Math. Soc. 130(2002), 1087-1093.
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Bedos, Erik Christopher
(2002).
Magnetic butterflies.
Show summary
A "magnetic butterfly" is obtained from the spectrum of a discrete magnetic Laplacian by letting one of the component of the magnetic field varies. In the talk , we illustrate two methods for computing approximations of some of these magnetic butterflies associated to discrete magnetic Laplacians on box lattices
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Bedos, Erik Christopher
(2001).
Review of "Groups with simple reduced C*-algebras" by Bekka, M. Bachir and de la Harpe, Pierre.
Mathematical Reviews.
ISSN 0025-5629.
Show summary
Anmeldelse av ovennevnte artikkel, som er publisert i Expo. Math. 18 (2000), 215-230.
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Bedos, Erik Christopher
(2001).
Amenability and algebraic quantum groups.
Show summary
Foredrag basert på to artikler om dette emnet, skrevet sammen med
Gerard M. Murphy og Lars Tuset.
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Bedos, Erik Christopher
(2001).
Co-amenability and compact quantum groups.
Show summary
Foredrag om en artikkel skrevet sammen med Gerard M. Murphy og Lars
Tuset.
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Bedos, Erik Christopher
(2000).
On "Permanence properties of C*-exact groups" by E. Kirchberg and S.Wassermann, Doc. Math. 4 (1999), 513-558.
Mathematical Reviews.
ISSN 0025-5629.
Show summary
Dette er en anmeldelse av ovennevnte artikkel
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Bedos, Erik Christopher
(2000).
On "C*-algebras, Gelfand-Kirillov dimension, and Følner sets", J. Funct. Anal. 171 (2000), 346-365.
Mathematical Reviews.
ISSN 0025-5629.
Show summary
Dette er en anmeldelse av ovennevnte artikkel
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Bedos, Erik Christopher
(2000).
On "Free *-subalgebras of C*-algebras" by A. Y. Samet-Vaillant, J. Funct. Anal. 171 (2000), 432-448.
Mathematical Reviews.
ISSN 0025-5629.
Show summary
Dette er en anmeldelse av ovennevnte artikkel
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Bedos, Erik Christopher
(2000).
On infinite tensor products of projective unitary representations.
Show summary
Foredrag om en artikkel med samme tittel skrevet sammen med Roberto Conti (univ. i Roma)
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Bedos, Erik Christopher
(1999).
A review of "Imprimitivity for C*-coactions of non-amenable groups" by S.Kaliszewski and J. Quigg.
Mathematical Reviews.
ISSN 0025-5629.
Show summary
Dette er en anmeldelse av en artikkel publisert i Math.-Proc.-Cambridge- Philos.-Soc 123(1998), 101-118.
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Bedos, Erik Christopher
(1999).
A review of "Central sequences in the factor associated with Thompson's group F" by P. Jolissaint.
Mathematical Reviews.
ISSN 0025-5629.
Show summary
Dette er en anmeldelse av en artikkel publisert i Ann. Inst. Fourier (Grenoble) 48 (1998), 1093-1096.
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Bedos, Erik Christopher; Kaliszewski, Steve & Quigg, John
(2015).
On Exel-Pardo algebras.
Cornell University Library Ithaca, NY14853, USA.
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Bedos, Erik Christopher & Conti, Roberto
(2013).
Fourier series and twisted C*-crossed products.
ArXiV, Cornell University Library, e-print (arXiV: 1303.7381),.
Show summary
This paper is an invitation to Fourier analysis in the context of reduced twisted C*- crossed products associated with discrete unital twisted C*-dynamical systems. We discuss norm-convergence of Fourier series, multipliers and summation processes. Our study relies in an essential way on the (covariant and equivariant) representation the- ory of C∗-dynamical systems on Hilbert C*-modules. It also yields some information on the ideal structure of reduced twisted C*-crossed products.
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Bedos, Erik Christopher
(2012).
Rom og lineæritet.
Universitetet i Oslo.
Show summary
Notater i videregående lineær algebra, beregnet for emnet MAT3000/4000 ved UiO, tilgjengelig på emnets hjemmeside.
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Bedos, Erik Christopher & Conti, Roberto
(2011).
On discrete twisted C*-dynamical systems, Hilbert C*-modules and regularity.
ArXiv, Cornell University Library, e-print (arXiv:1104.1731).
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Bedos, Erik Christopher & Conti, Roberto
(2006).
Twisted Fourier analysis and convergence of Fourier series on discrete groups.
Universitetet i Oslo.
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Bedos, Erik Christopher
(2002).
Maple-eksempler for MAT120A.
Show summary
Dette er en samling Maple-illustrasjoner laget for kurset MAT120a
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Bedos, Erik Christopher
(2001).
Maple-eksempler og oppgaver for MAT110a.
7Letras.
Show summary
Dette er en samling av Maple-illustrasjoner og oppgaver laget for
kurset MAT110a.
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Bedos, Erik Christopher; Murphy, Gerard M. & Tuset, Lars
(2001).
Amenability and co-amenability of algebraic quantum groups.
Matematisk Institutt, UiO.
ISSN 82-553-1313-3.
Show summary
We define concepts of amenability and co-amenability for algebraic
quantum groups in the sense of A.Van Daele. We show that co-amenability
of an algebraic quantum group always implies amenability of its dual.
Various necessary and/or sufficient conditions for amenability or
co-amenability are obtained. Co-amenability is shown to have
interesting consequences for the modular theory in the case that the
algebraic quantum group is of compact type.
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Bedos, Erik Christopher; Murphy, Gerard M. & Tuset, Lars
(2001).
Amenability and co-amenability of algebraic quantum groups II.
Matematisk Institutt, UiO.
ISSN 82-553-1314-1.
Show summary
We continue our study of the concepts of amenability and co-amenability
for algebraic quantum groups in the sense of A. Van Daele and our
investigation of their relationship with nuclearity and injectivity.
One major tool for our analysis is that every non-degenerate
*-representation of the universal C*-algebra associated to an algebraic
quantum group has a unitary generator which may be described in a
concrete way.
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Bedos, Erik Christopher; Conti, Roberto & Tuset, Lars
(2001).
On amenability and co-amenability of algebraic quantum groups and their corepresentations.
Matematisk Institutt, UiO.
ISSN 82-553-1318-4.
Show summary
We introduce and study several amenability properties for unitary
corepresentations and *-representations of algebraic quantum groups,
which may be used to characterize amenability or co-amenability of such
groups. As a background for this study, we also investigate the
involved tensor C*-categories.
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Bedos, Erik Christopher; Murphy, Gerard M. & Tuset, Lars
(2000).
Co-amenability of compact quantum groups.
Matematisk Institutt, Univ. i Oslo.
ISSN 82-553-1259-5.
Show summary
We study the concept of co-amenability for a compact quantum
group. Several conditions are derived that are shown to be equivalent to it. Some consequences of co-amenability that we obtain are faithfulness of the Haar integral and automatic norm-boundedness of positive linear functionals on the quantum group's Hopf *-algebra (neither of these
properties necessarily holds without co-amenability).
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Bedos, Erik Christopher
(2000).
Lab. øvelser i Maple for MAT 100a.
Universitetet i Oslo.
Show summary
Heftet består av seks lab. øvelser i Maple som er obligatoriske for studenter som tar kurste MAT 100a
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Bedos, Erik Christopher
(2000).
Lab. øvelser i Maple for MAT 100c.
Universitetet i Oslo.
Show summary
Heftet består av syv lab. øvelser i MAple som er obligatoriske for studenter som tar kurset MAT 100c
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Bedos, Erik Christopher & Conti, Roberto
(1999).
On infinite tensor products of projective unitary representations.
Matematisk Institutt, UiO.
ISSN 0806-2439.
26.
Show summary
We initiate a study of infinite tensor products of
projective unitary representations of a discrete group G.
Special attention is given to regular representations twisted by 2-cocycles and to projective representations associated with CCR-representations of bilinear maps. Detailed computations are presented in the case where G is a finitely generated free abelian group. We also apply our results to discuss an extension problem about product type actions of G, where the projective representation theory of G plays a central role.
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Bedos, Erik Christopher
(1999).
Maple lab. øvelser for Ma100.
7Letras.
Show summary
Heftet består av 6 lab. øvelser og gir en elementær innføring i bruk av Maple ved å illustrere utvagte temaer fra Ma100 (Kalkulus). Heftet er ment til å utfylle boka "Getting started with Maple" av Cheung, Keough og May (John Wiley & Sons, 1998).
