Geodesic
The positivity problem for fourth order linear recurrence sequences is decidable
Pinthira Tangsupphathawat 1   ; Narong Punnim 1   ; Vichian Laohakosol 2
1 Department of Mathematics Srinakharinwirot University Bangkok 10110, Thailand
2 Department of Mathematics Kasetsart University Bangkok 10900, Bangkok and Centre of Excellence in Mathematics CHE, Bangkok 10400, Thailand
Colloquium Mathematicum, Tome 128 (2012) no. 1, pp. 133-142 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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The problem whether each element of a sequence satisfying a fourth order linear recurrence with integer coefficients is nonnegative, referred to as the Positivity Problem for fourth order linear recurrence sequence, is shown to be decidable.
DOI : 10.4064/cm128-1-11
Keywords: problem whether each element sequence satisfying fourth order linear recurrence integer coefficients nonnegative referred positivity problem fourth order linear recurrence sequence shown decidable

Pinthira Tangsupphathawat  1   ; Narong Punnim  1   ; Vichian Laohakosol  2

1 Department of Mathematics Srinakharinwirot University Bangkok 10110, Thailand
2 Department of Mathematics Kasetsart University Bangkok 10900, Bangkok and Centre of Excellence in Mathematics CHE, Bangkok 10400, Thailand 
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Pinthira Tangsupphathawat; Narong Punnim; Vichian Laohakosol. The positivity problem for fourth order linear recurrence sequences is decidable. Colloquium Mathematicum, Tome 128 (2012) no. 1, pp. 133-142. doi: 10.4064/cm128-1-11

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