Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twisted conjugacy in fundamental groups of geometric $3$-manifolds   A group $G$ has property $R_\infty$ if for every $\phi\in Aut(G)$, there are
an infinite number of $\phi$-twisted conjugacy classes of elements in $G$. In
this note, we determine the $R_\infty$-property for $G=\pi_1(M)$ for all
geometric $3$-manifolds $M$.

1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th