Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Mathematics of Fraternal Birth Order Effect and the Genetics of
  Homosexuality   Mathematicians have always been attracted to the field of genetics. I am
especially interested in the mathematical aspects of research on homosexuality.
Certain studies show that male homosexuality may have a genetic component that
is correlated with female fertility. Other studies show the existence of the
fraternal birth order effect, that is the correlation of homosexuality with the
number of older brothers.
  This paper is devoted to the mathematical aspects of how these two phenomena
are interconnected. In particular, I show that the fraternal birth order effect
produces a correlation between homosexuality and maternal fecundity. Vice
versa, I show that the correlation between homosexuality and female fecundity
implies the increase of the probability of the younger brothers being
homosexual.

1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas