The Moser–Trudinger inequality and its extremals on a disk via energy estimates

The Moser–Trudinger inequality and its extremals on a disk via energy estimates We study the Dirichlet energy of non-negative radially symmetric critical points $$u_\mu $$ u μ of the Moser–Trudinger inequality on the unit disc in $$\mathbb {R}^2$$ R 2 , and prove that it expands as $$\begin{aligned} 4\pi +\frac{4\pi }{\mu ^{4}}+o(\mu ^{-4})\le \int _{B_1}|\nabla u_\mu |^2dx\le 4\pi +\frac{6\pi }{\mu ^{4}}+o(\mu ^{-4}),\quad \text {as }\mu \rightarrow \infty , \end{aligned}$$ 4 π + 4 π μ 4 + o ( μ - 4 ) ≤ ∫ B 1 | ∇ u μ | 2 d x ≤ 4 π + 6 π μ 4 + o ( μ - 4 ) , as μ → ∞ , where $$\mu =u_\mu (0)$$ μ = u μ ( 0 ) is the maximum of $$u_\mu $$ u μ . As a consequence, we obtain a new proof of the Moser–Trudinger inequality, of the Carleson–Chang result about the existence of extremals, and of the Struwe and Lamm–Robert–Struwe multiplicity result in the supercritical regime (only in the case of the unit disk). Our results are stable under sufficiently weak perturbations of the Moser–Trudinger functional. We explicitly identify the critical level of perturbation for which, although the perturbed Moser–Trudinger inequality still holds, the energy of its critical points converges to $$4\pi $$ 4 π from below. We expect, in some of these cases, that the existence of extremals does not hold, nor the existence of critical points in the supercritical regime. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Calculus of Variations and Partial Differential Equations Springer Journals

The Moser–Trudinger inequality and its extremals on a disk via energy estimates

Loading next page...
 
/lp/springer_journal/the-moser-trudinger-inequality-and-its-extremals-on-a-disk-via-energy-yesk03p48F
Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag Berlin Heidelberg
Subject
Mathematics; Analysis; Systems Theory, Control; Calculus of Variations and Optimal Control; Optimization; Theoretical, Mathematical and Computational Physics
ISSN
0944-2669
eISSN
1432-0835
D.O.I.
10.1007/s00526-017-1184-y
Publisher site
See Article on Publisher Site

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial