Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $d$-semistable Calabi--Yau threefolds of Type III   We develop some methods to construct normal crossing varieties whose dual
complexes are two-dimensional, which are smoothable to Calabi--Yau threefolds.
We calculate topological invariants of smoothed Calabi--Yau threefolds and show
that several of them are new examples.

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The categories of this paper are: cs
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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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: cond-mat
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio