Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spacetimes with all scalar curvature invariants in terms of the
  Cosmological Constant   In this letter we provide an invariant characterization for all spacetimes
with all polynomial scalar invariants constructed from the Riemann tensor and
its covariant derivatives vanishing except those zeroth order curvature
invariants expressed as polynomials in $\Lambda$, the cosmological constant.
Using this invariant description we provide explicit forms for the metric.

19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio