Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiplicative structures on homotopy spectral sequences I   This mostly expository paper records some basic facts about towers of
homotopy fiber sequences. We give a proof that a pairing of towers induces a
pairing of associated spectral sequences, for towers of spaces and towers of
spectra.

29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat