Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Momentum relation and classical limit in the future-not-included complex
  action theory   Studying the time development of the expectation value in the
future-not-included complex action theory, we point out that the momentum
relation (the relation analogous to $p=\frac{\partial L}{\partial \dot{q}}$),
which was derived via the Feynman path integral and was shown to be correct in
the future-included theory in our previous papers, is not valid in the
future-not-included theory. We provide the correct momentum relation in the
future-not-included theory, and argue that the future-not-included classical
theory is described by a certain real action. In addition, we provide another
way to understand the time development of the future-not-included theory by
utilizing the future-included theory. Furthermore, properly applying the method
used in our previous paper to the future-not-included theory by introducing a
formal Lagrangian, we derive the correct momentum relation in the
future-not-included theory.

8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph