Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bitcoin With Heterogeneous Block Sizes: A Scaling Proposal   We propose a bitcoin generalization as a solution to the problem of
scalability. The block is redefined as a sequence of sub-blocks of increasing
sizes that coexist as different levels of compromise between decentralization
and transactions throughput. Miners and users can decide individually the sizes
they use without affecting others in the network.

30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol