Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimizing directed self-assembled morphology   Directed assembly of block polymers is rapidly becoming a viable strategy for
lithographic patterning of nanoscopic features. One of the key attributes of
directed assembly is that an underlying chemical or topographic substrate
pattern used to direct assembly need not exhibit a direct correspondence with
the sought after block polymer morphology, and past work has largely relied on
trial-and-error approaches to design appropriate patterns. In this work, a
computational evolutionary strategy is proposed to solve this optimization
problem. By combining the Cahn-Hilliard equation, which is used to find the
equilibrium morphology, and the covariance-matrix evolutionary strategy, which
is used to optimize the combined outcome of particular substrate-copolymer
combinations, we arrive at an efficient method for design of substrates leading
to non-trivial, desirable outcomes.

23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph