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- Michael Th. Rassias, Bicheng Yang
- Applied Mathematics and Computation
- 2013

- Michael Th. Rassias, Bicheng Yang
- Applied Mathematics and Computation
- 2013

- Michael Th. Rassias, Bicheng Yang
- Applied Mathematics and Computation
- 2014

- Michael Th. Rassias, Bicheng Yang
- Applied Mathematics and Computation
- 2014

In this paper, by the application of methods of weight functions and the use of analytic techniques, a multidimensional more accurate half-discrete Hilbert-type inequality with the kernel of the hyperbolic cotangent function is proved. We show that the constant factor related to the Riemann zeta function is the best possible. Equivalent forms as well as… (More)

- Soon-Mo Jung, Michael Th. Rassias, Cristinel Mortici
- Applied Mathematics and Computation
- 2015

In this paper, we study the functional equation, f(x+y)f(x)f(y) = d sinx sin y. Some generalizations of the above functional equation are also considered.

- Michael Th. Rassias
- Applied Mathematics and Computation
- 2014

We consider a cotangent sum related to Estermann's Zeta function. We provide an elementary and self-contained improvement of the error term in an asymptotic formula proved by V. I. Vasyunin.

- Yang-Hi Lee, Soon-Mo Jung, Michael Th. Rassias
- Applied Mathematics and Computation
- 2014

- Gradimir V. Milovanovic, Michael Th. Rassias
- J. Global Optimization
- 2013

- Soon-Mo Jung, Dorian Popa, Michael Th. Rassias
- J. Global Optimization
- 1941

In this paper we obtain a result on Hyers-Ulam stability of the linear functional equation in a single variable f(φ(x)) = g(x) · f(x) on a complete metric group.

and Applied Analysis 3 In 2008, Gordji et al. 17 provided the solution as well as the stability of a mixed type cubic-quartic functional equation. We only mention here the papers 19, 32, 33 concerning the stability of the mixed type functional equations. In this paper, we deal with the following general cubic-quartic functional equation: f ( x ky ) f ( x −… (More)

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