Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sidecoin: a snapshot mechanism for bootstrapping a blockchain   Sidecoin is a mechanism that allows a snapshot to be taken of Bitcoin's
blockchain. We compile a list of Bitcoin's unspent transaction outputs, then
use these outputs and their corresponding balances to bootstrap a new
blockchain. This allows the preservation of Bitcoin's economic state in the
context of a new blockchain, which may provide new features and technical
innovations.

28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int