Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the variety of strict pseudosemilattices   A new model, in terms of finite bipartite graphs, of the free
pseudosemilattice is presented. This will then be used to obtain several
results about the variety SPS of all strict pseudosemilattices: (i) an identity
basis for SPS is found, (ii) SPS is shown to be inherently non-finitely based,
(iii) SPS is shown to have no irredundant identity basis, and (iv) SPS is shown
to have no covers and to be meet-prime in the lattice of all varieties of
pseudosemilattices. Some applications to e-varieties of locally inverse
semigroups are also derived.

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The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys