Results 41 to 50 of about 156,468 (326)

Gilbreath Equation, Gilbreath Polynomials, and Upper and Lower Bounds for Gilbreath Conjecture

open access: yesMathematics, 2023
Let S=s1,…,sn be a finite sequence of integers. Then, S is a Gilbreath sequence of length n, S∈Gn, iff s1 is even or odd and s2,…,sn are, respectively, odd or even and minKs1,…,sm≤sm+1≤maxKs1,…,sm,∀m∈1,n.
Riccardo Gatti
doaj   +1 more source

Lower and upper bounds of shortest paths in reachability graphs

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
We prove the following property for safe marked graphs, safe conflict-free Petri nets, and live and safe extended free-choice Petri nets. We prove the following three results. If the Petri net is a marked graph, then the length of the shortest path is at
P. K. Mishra
doaj   +1 more source

Equilibrium problems with lower and upper bounds

open access: yesApplied Mathematics Letters, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ouayl Chadli   +2 more
openaire   +2 more sources

New upper and lower bounds for the upper incomplete gamma function

open access: yesResults in Applied Mathematics
Some new upper and lower bounds for the upper incomplete gamma function Γ(a,x) are presented. Some of the bounds are given for all real x>0 and some are for only certain combinations of a and x.
Steven G. From, Suthakaran Ratnasingam
doaj   +1 more source

NEW UPPER AND LOWER BOUNDS LINE OF SIGHT PATH LOSS MODELS FOR MOBILE PROPAGATION IN BUILDINGS

open access: yesASEAN Journal on Science and Technology for Development, 2017
This paper proposes a method to predict line-of-sight (LOS) path loss in buildings. We performed measurements in two different type of buildings at a frequency of 1.8 GHz and propose new upper and lower bounds path loss models which depend on max and min
Supachai Phaiboon   +2 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

open access: yesFEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa   +5 more
wiley   +1 more source

Upper and lower bounds on the integrated null energy in gravity

open access: yesJournal of High Energy Physics, 2019
We prove a lower bound on the integrated null energy along achronal geodesic segments using induced gravity on a brane in AdS/CFT. The bound follows from the assumption that bulk causality respects brane causality, and matches a bound recently ...
Stefan Leichenauer, Adam Levine
doaj   +1 more source

Improved upper and lower bounds for modal logics of programs

open access: yesSymposium on the Theory of Computing, 1985
We describe novel techniques for establishing improved upper and lower bounds for modal logics of programs: 1) We introduce hybrid tree automata. These automata seems to be doubly exponential more powerful than Rabin tree automata but their emptiness ...
Moshe Y. Vardi, L. Stockmeyer
semanticscholar   +1 more source

Upper and lower Ramsey bounds in bounded arithmetic

open access: yesAnnals of Pure and Applied Logic, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

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