Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On lambda-rings and topological realization   It is shown that most possibly truncated power series rings admit uncountably
many filtered lambda-ring structures. The question of how many of these
filtered lambda-ring structures are topologically realizable by the K-theory of
torsionfree spaces is also considered for truncated polynomial rings.

34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph