Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on ccc forcings   The aim of this short note is to communicate a simple solution to the problem
posed in [1] as Question 7.2.7: is it true that for every ccc $\sigma$-ideal I
any I-positive Borel set contains modulo I an I-positive closed set?

21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th