Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Square and Delta reflection   Starting from infinitely many supercompact cardinals, we force a model of ZFC
where $\aleph_{\omega^2+1}$ satisfies simultaneously a strong principle of
reflection, called $\Delta$-reflection, and a version of the square principle,
denoted $\square(\aleph_{\omega^2+1}).$ Thus we show that $\aleph_{\omega^2+1}$
can satisfy simultaneously a strong reflection principle and an anti-reflection
principle.

20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio