Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chemical Elements at High and Low Redshifts   The past few years have seen a steady progress in the determination of
element abundances at high redshifts, with new and more accurate measures of
metallicities in star-forming galaxies, in QSO absorbers, and in the
intergalactic medium. We have also become more aware of the limitations of the
tools at our disposal in such endeavours. I summarise these recent developments
and--in tune with the theme of this meeting--consider the clues which chemical
abundance studies offer to the links between the high redshift galaxy
populations and today's galaxies. The new data are `fleshing out' the overall
picture of element abundances at redshifts z = 2 - 3 which has been gradually
coming into focus over the last decade. In particular, we can now account for
at least 40% of the metals produced by the global star formation activity in
the universe from the Big Bang to z = 2.5, and we have strong indications of
where the remainder are likely to be found.

35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ