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Achenef Tesfahun Temesgen's picture

Achenef Tesfahun Temesgen

Associate Professor
  • E-mailAchenef.Temesgen@uib.no
  • Phone+47 55 58 26 59
  • Visitor Address
    Realfagbygget, Allégt. 41
  • Postal Address
    Postboks 7803
    5020 Bergen
Journal articles
  • Tesfahun, Achenef. 2019. Remark on the persistence of spatial analyticity for cubic nonlinear Schr\"{o}dinger equation on the circle. NoDEA. Nonlinear differential equations and applications (Printed ed.). 26. doi: 10.1007/s00030-019-0558-6
  • Tesfahun, Achenef. 2019. Growth-in-time of higher Sobolev norms of solutions to the 1D Dirac-Klein-Gordon system. Journal of Hyperbolic Differential Equations.
  • Tesfahun, Achenef. 2019. Small data scattering for a cubic Dirac equation with Hartree type nonlinearity in $\R^{1+3}$. SIAM Journal on Mathematical Analysis.
  • Tesfahun, Achenef. 2018. Asymptotic lower bound for the radius of spatial analyticity to solutions of KdV equation. Communications in Contemporary Mathematics. doi: 10.1142/S021919971850061X
  • Tesfahun, Achenef. 2018. Long-time Behavior of Solutions to Cubic Dirac Equation with Hartree Type Nonlinearity in $\R^{1+2}$. International mathematics research notices. 00: 1-50. doi: 10.1093/imrn/rny217
  • Selberg, Sigmund; Tesfahun, Achenef. 2017. On the radius of spatial analyticity for the quartic generalized KdV equation. Annales de l'Institute Henri Poincare. Physique theorique. 18: 3553-3564. doi: 10.1007/s00023-017-0605-y
  • Tesfahun, Achenef. 2017. On the radius of spatial analyticity for cubic nonlinear Schrödinger equations. Journal of Differential Equations. 263: 7496-7512. doi: 10.1016/j.jde.2017.08.009
  • Selberg, Sigmund; Tesfahun, Achenef. 2016. Null structure and local well-posedness in the energy class for the Yang-Mills equations in Lorenz Gauge. Journal of the European Mathematical Society (Print). 18: 1729-1752. doi: 10.4171/JEMS/627
  • Herr, Sebastian; Tesfahun, Achenef. 2015. Small data scattering for semi-relativistic equations with Hartree type nonlinearity. Journal of Differential Equations. 259: 5510-5532. Published 2015-11-25. doi: 10.1016/j.jde.2015.06.037
  • Selberg, Sigmund; Temesgen, Achenef Tesfahun. 2015. On the radius of spatial analyticity for the 1d Dirac–Klein–Gordon equations. Journal of Differential Equations. 259: 4732-4744. doi: 10.1016/j.jde.2015.06.007
  • Temesgen, Achenef Tesfahun. 2015. Finite energy local well-posedness for the Yang-Mills-Higgs equations in Lorenz Gauge. International mathematics research notices. 2015: 5140-5161. doi: 10.1093/imrn/rnu087
  • Temesgen, Achenef Tesfahun. 2015. Local well-posedness of Yang-Mills equations in Lorenz gauge below the energy norm. NoDEA. Nonlinear differential equations and applications (Printed ed.). 22: 849-875. doi: 10.1007/s00030-014-0306-x
  • Tesfahun, Achenef. 2015. Almost critical local well-posedness for the space-time monopole equation in Lorenz gauge. Communications in Contemporary Mathematics. 17. doi: 10.1142/S0219199714500436
  • Selberg, Sigmund; Tesfahun, Achenef. 2013. Global well-posedness of the Chern-Simons-Higgs equations with finite energy. Discrete and Continuous Dynamical Systems. Series A. 33: 2531-2546. doi: 10.3934/dcds.2013.33.2531
  • Selberg, Sigmund; Tesfahun, Achenef. 2013. Unconditional uniqueness in the charge class for the Dirac-Klein-Gordon equations in two space dimensions. NoDEA. Nonlinear differential equations and applications (Printed ed.). 20: 1055-1063. Published 2012-08-31. doi: 10.1007/s00030-012-0196-8
  • Selberg, Sigmund; Temesgen, Achenef Tesfahun. 2010. Remarks on regularity and uniqueness of the Dirac-Klein-Gordon equations in one space dimension. NoDEA. Nonlinear differential equations and applications (Printed ed.). 17: 453-465. doi: 10.1007/s00030-010-0062-5
  • Selberg, Sigmund; Tesfahun, Achenef. 2010. Low regularity well-posedness for some nonlinear Dirac equations in one space dimension. Differential and Integral Equations. 23: 265-278.
  • Selberg, Sigmund; Tesfahun, Achenef. 2010. Finite-energy global well-posedness of the Maxwell-Klein-Gordon equations in Lorenz gauge. Communications in Partial Differential Equations. 35: 1029-1057. doi: 10.1080/03605301003717100
  • Temesgen, Achenef Tesfahun. 2009. GLOBAL WELL-POSEDNESS OF THE 1D DIRAC-KLEIN-GORDON SYSTEM IN SOBOLEV SPACES OF NEGATIVE INDEX. Journal of Hyperbolic Differential Equations. 6: 631-661. doi: 10.1142/S0219891609001952
  • Selberg, S; Tesfahun, Achenef. 2008. Low regularity well-posedness of the Dirac-Klein-Gordon equations in one space dimension. Communications in Contemporary Mathematics. 10: 181-194.
  • Selberg, Sigmund; Tesfahun, Achenef. 2008. Low regularity well-posedness of the Dirac-Klein-Gordon system in one space dimension. Communications in Contemporary Mathematics. 10: 181-194.
  • Tesfahun, Achenef. 2007. LOW REGULARITY AND LOCAL WELL-POSEDNESS FOR THE 1+3 DIMENSIONAL DIRAC-KLEIN-GORDON SYSTEM. Electronic Journal of Differential Equations. 2007: 1-26.
Reports and theses
  • Temesgen, Achenef Tesfahun. 2009. Regularity results for the Dirac-Klein-Gordon equations. Doktoravhandlinger ved NTNU. 152. NTNU Trykk, Trondheim. 76 pages.

More information in national current research information system (CRIStin)