Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Universal Axiomatization of Metropolis-Rota Implication Algebras   We show that the class of Metropolis-Rota implication algebras can be given a
universal axiomatization using an operation closely related to composition in
oriented matroids. Lastly we describe the role of our new operation in the
collapse of an MR-algebra.

1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas