Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Piecewise hereditary algebras under field extensions   Let $A$ be a finite-dimensional $k$-algebra and $K/k$ be a finite separable
field extension. We prove that $A$ is derived equivalent to a hereditary
algebra if and only if so is $A\otimes_kK$.

14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: econ