Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the duality of space-trusses and plate structures of rigid plates and
  elastic edges   Dualities have been known to map space trusses and plate structures to each
other since the 1980-s. Yet the computational similarity of the two has not
been used to solve the unfamiliar plate structure with the methods of the well
known truss. This paper gives a method to find the forces and displacements of
a plate structure with rigid plates and elastic edges, using a dual truss. It
is applicable for both statically determinate and indeterminate structures,
subjected to both statical and kinematical loads.

19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an