Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On restriction estimates for the zero radius sphere over finite fields   In this paper, we solve completely the $L^2\to L^r$ extension conjecture for
the zero radius sphere over finite fields. We also obtain the sharp $L^p\to
L^4$ extension estimate for non-zero radii spheres over finite fields, which
improves significantly the previous result of the first and second listed
authors.

25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci