Dipolar recoupling pulse sequences are of great importance in magic angle spinning solid-state NMR. Recoupling sequences are used for excitation of double-quantum coherence, which, in turn, is employed in experiments to estimate internuclear distances and molecular torsion angles. Much effort is spent on the design of recoupling sequences that are able to produce double-quantum coherence with h...

We consider log-convex sequences that satisfy an additional constraint imposed on their rate of growth. We call such sequences log-balanced. It is shown that all such sequences satisfy a pair of double inequalities. Sufficient conditions for log-balancedness are given for the case when the sequence satisfies a two(or more-) term linear recurrence. It is shown that many combinatorially interesti...

This paper proposes rough convergence and statistical of a double sequence in intuitionistic fuzzy normed spaces. It then defines the limit points cluster these Afterwards, this examines some their basic properties. Finally, it discusses need for further research.

In this paper, we introduce the concept of triangular A-statistical relative convergence for double sequences functions defined on a compactsubset real two-dimensional space. Based upon new convergencemethod, prove Korovkin-type approximation theorem. Finally, give some further developments.