Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Homological subsets of Spec   We recover some data of a module $M$ from the Ext-family $\{\Ext^i_R(M,R)\}$.
In this regard, we investigate homological subsets of $\Spec(R)$, defined by
the help of Ext-family. We extend Grothendieck's calculation of
$\dim(\Ext^g_R(M,R))$. Also, we compute support and the set of all associated
prime ideals of the Ext-family in a serial of nontrivial cases.

33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom