arXiv
Open Access
2021
The coarsest lattice that determines a discrete multidimensional system
Debasattam Pal
Shiva Shankar
Abstrak
A discrete multidimensional system is the set of solutions to a system of linear partial difference equations defined on the lattice $\Z^n$. This paper shows that it is determined by a unique coarsest sublattice, in the sense that the solutions of the system on this sublattice determine the solutions on $\Z^n$; it is therefore the correct domain of definition of the discrete system. In turn, the defining sublattice is determined by a Galois group of symmetries that leave invariant the equations defining the system. These results find application in understanding properties of the system such as controllability and autonomy, and in its order reduction.
Penulis (2)
D
Debasattam Pal
S
Shiva Shankar
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2021
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- en
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- arXiv
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- Open Access ✓