Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Are There Many Worlds?   It is often thought that the existence of other worlds cannot be
scientifically verified and therefore should be treated as philosophical
speculation. In this article, I describe several methods for determining if
other worlds exist, even without interacting with them. These methods are based
on the following premise: if there are many worlds, then the statistical
properties of a natural process are biased when measured by an observer whose
existence was influenced by the process. The bias is always in the same
direction, making the process appear more beneficial for the existence of the
observer than it actually is. I suggest several potential ways of measuring the
bias, show through a simple model of population dynamics how the bias is
generated, and briefly consider whether our current drop in population growth
is evidence of many worlds.

34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat