Let $\gamma:[0,1]\rightarrow \mathbb{S}^{2}$ be a non-degenerate curve in $\mathbb{R}^3$, that is to say, $\det\big(\gamma(\theta),\gamma'(\theta),\gamma''(\theta)\big)\neq 0$. For each $\theta\in[0,1]$, let $l_\theta=\{t\gamma(\theta):t\in\mathbb{R}\}$ and $\rho_\theta:\mathbb{R}^3\rightarrow l_\theta$ be the orthogonal projections. We prove an exceptional set estimate. For any Borel set $A\subset\mathbb{R}^3$ and $0\le s\le 1$, define $E_s(A):=\{\theta\in[0,1]: \text{dim}(\rho_\theta(A))<s\}$. We have $\text{dim}(E_s(A))\le 1+\frac{s-\text{dim}(A)}{2}$.Comment: 11 pages. arXiv admin note: substantial text overlap with arXiv:2207.1384
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summary:The Hahn--Banach theorem implies that if $m$ is a one dimensional subspace of a t.v.s. $E$, ...
It is shown that if $\gamma: [a,b] \to S^2$ is $C^3$ with $\det(\gamma, \gamma', \gamma'') \neq 0$, ...
Let $0 \leq s \leq 1$ and $0 \leq t \leq 2$. An $(s,t)$-Furstenberg set is a set $K \subset \mathbb{...
Let $A \subseteq \mathbb{R}^n$ be analytic. An exceptional set of projections for $A$ is a set of $k...
Let $X=\text{SL}_3(\mathbb{R})/\text{SL}_3(\mathbb{Z})$, and $g_t=\text{diag}(e^{2t}, e^{-t}, e^{-t}...
Let $C$ be an irreducible projective curve of degree $d$ in $\mathbb{P}^3$, defined over $\overline{...
We prove two new exceptional set estimates for radial projections in the plane. If $K \subset \mathb...
Let $\Gamma \subset \mathbb C$ be a curve of class $C(2,\alpha)$. For $z_{0}$ in the unbounded compo...
We establish the intrinsic Harnack inequality for non-negative solutions of a class of degenerate, ...
In this paper, we establish Schr\"{o}dinger maximal estimates associated with the finite type phases...
In the first part of this thesis, it is shown that if $A \subseteq \mathbb{R}^3$ is a Borel set of H...
It is proved that sense preserving continuous mappings f : D → Rn of a domain D in Rn, n > 2, satisf...
We make progress on several interrelated problems at the intersection of geometric measure theory, a...
We consider, for a class of functions $\varphi : \mathbb{R}^{2} \setminus \{ {\bf 0} \} \to \mathbb{...
We prove that any set of points in $\mathbb{R}^d$, any three of which form an angle less than $\frac...
summary:The Hahn--Banach theorem implies that if $m$ is a one dimensional subspace of a t.v.s. $E$, ...