Skip to main content Accessibility help

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
×
  1. Home
  2. Search

Refine search

Refine search

Access:
Content type:
Publication date:
Apply   From and To filters
Subject: Show more
Journals Show more
Publishers: Show more
Societies Show more
Series: Show more
Collections: Show more

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×

66 results

Page 1 of 4

  • Global electromagnetic turbulence simulations of W7-X-like plasmas with GENE-3D

  • Part of
  • Felix Wilms, Alejandro Bañón Navarro, Gabriele Merlo, Leonhard Leppin, Tobias Görler, Tilman Dannert, Florian Hindenlang, Frank Jenko
  • Journal:
    Journal of Plasma Physics / Volume 87 / Issue 6 / December 2021
    Published online by Cambridge University Press:
    23 November 2021, 905870604
    • Article
      • You have access
      • Open access
    • PDF
    • HTML
    • Export citation

  • The GENE-3D code, the global stellarator version of the established GENE framework, has been extended to an electromagnetic gyrokinetic code. This paper outlines the basic structure of the algorithm, highlighting the treatment of the electromagnetic terms. The numerical implementation is verified against the radially global GENE code in linear and nonlinear tokamak simulations, recovering excellent agreement between both codes. As a first application to stellarator plasmas, linear and nonlinear global simulations with kinetic electrons of ion temperature gradient (ITG) turbulence in Wendelstein 7-X were performed, showing a decrease of ITG activity through the introduction of electromagnetic effects via a finite plasma-$\beta$. The upgrade makes it possible to study a large variety of new physical scenarios, including kinetic electron and electromagnetic effects, reducing the gap between gyrokinetic models and physically realistic systems.

  • The fields of values of characters of degree not divisible by p

  • Part of
  • Gabriel Navarro, Pham Huu Tiep
  • Journal:
    Forum of Mathematics, Pi / Volume 9 / 2021
    Published online by Cambridge University Press:
    15 February 2021, e2
    • Article
      • You have access
      • Open access
    • PDF
    • Export citation

  • We study the fields of values of the irreducible characters of a finite group of degree not divisible by a prime p. In the case where $p=2$, we fully characterise these fields. In order to accomplish this, we generalise the main result of [ILNT] to higher irrationalities. We do the same for odd primes, except that in this case the analogous results hold modulo a simple-to-state conjecture on the character values of quasi-simple groups.

Character Theory and the McKay Conjecture
  • Gabriel Navarro
  • Published online:
    17 May 2018
    Print publication:
    26 April 2018
  • The McKay conjecture is the origin of the counting conjectures in the representation theory of finite groups. This book gives a comprehensive introduction to these conjectures, while assuming minimal background knowledge. Character theory is explored in detail along the way, from the very basics to the state of the art. This includes not only older theorems, but some brand new ones too. New, elegant proofs bring the reader up to date on progress in the field, leading to the final proof that if all finite simple groups satisfy the inductive McKay condition, then the McKay conjecture is true. Open questions are presented throughout the book, and each chapter ends with a list of problems, with varying degrees of difficulty.

Page 1 of 4