Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On three open problems related to quasi relative interior   We give answers to two questions formulated by Borwein and Goebel in 2003 and
to a conjecture formulated by Grad and Pop in 2014 related to calculus rules
for quasi (relative) interior.

11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol