Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Approximation via toy Fock space - the vacuum-adapted viewpoint   After a review of how Boson Fock space (of arbitrary multiplicity) may be
approximated by a countable Hilbert-space tensor product (known as toy Fock
space) it is shown that vacuum-adapted multiple quantum Wiener integrals of
bounded operators may be expressed as limits of sums of operators defined on
this toy space, with strong convergence on the exponential domain. The
vacuum-adapted quantum Ito product formula is derived with the aid of this
approximation and a brief pointer is given towards the unbounded case.

13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex