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arXiv · 2305.18105

The Onsager conjecture in 2D: a Newton-Nash iteration

Vikram Giri·Razvan-Octavian Radu
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Abstract

For any $\gamma<1/3$, we construct a nontrivial weak solution $u$ to the two-dimensional, incompressible Euler equations, which has compact support in time and satisfies $u\in C^\gamma(\mathbb R_t \times \mathbb T^2_x)$. In particular, the constructed solution does not conserve energy and, thus, settles the flexible part of the Onsager conjecture in two dimensions. The proof involves combining the Nash iteration technique with a new linear Newton iteration.

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Vikram Giri, Razvan-Octavian Radu. 2023-05-29. The Onsager conjecture in 2D: a Newton-Nash iteration. https://arxiv.org/abs/2305.18105

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