Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fundamental Strings and D-strings in the IIB Matrix Model   The matrix model for IIB Superstring proposed by Ishibashi, Kawai, Kitazawa
and Tsuchiya is investigated. Consideration of planar and non-planar diagrams
suggests that the large N perturbative expansion is consistent with the double
scaling limit proposed by the above authors. We write down a Wilson loop that
can be interpreted as a fundamental string vertex operator. The one point
tadpole in the presence of a D-string has the right form and this can be viewed
as a matrix model derivation of the boundary conditions that define a D-string.
We also argue that if world sheet coordinates $\sigma$ and $\tau$ are
introduced for the fundamental string, then the conjugate variable
${d}/{d\sigma}$ and ${d}/{d\tau}$ can be interpreted as the D-string world
sheet coordinates. In this way the $SL(2Z)$ duality group of the IIB
superstring becomes identified with the symplectic group acting on ($p,q$).

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The categories of this paper are: acc-phys
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The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an