M athematical
I nequalities
& A pplications
Volume 18, Number 3 (2015), 923–940 doi:10.7153/mia-18-69
DISCRETE, CONTINUOUS, DELTA, NABLA,
AND DIAMOND–ALPHA OPIAL INEQUALITIES
M
ARTIN J. BOHNER,RAMY R. MAHMOUD AND SAMIR H. SAKER
Abstract. In this paper, we prove some new diamond-alpha dynamic inequalities of Opial type
with one and with two weight functions on time scales. These results contain as special cases
improvements of results given in the literature, and these improvements are new even in the
important discrete case.
Mathematics subject classification (2010): 39A10, 39A12, 26D15.
Keywords and phrases: Time scales, diamond-alpha derivatives, Opial’s inequality.
REFERENCES
[1] R. A
GARWAL,M.BOHNER, AND A. PETERSON, Inequalities on time scales: A survey,Math.In-
equal. Appl., 4 (4): 535–557, 2001.
[2] R. P. A
GARWAL AND P. Y. H . PANG, Opial Inequalities with Applications in Differ ential and Differ-
ence Equations, Kluwer Academic Publishers, Dordrecht, 1995.
[3] N. A
TAS EVER ,B.KAYMAKC¸ALAN,G.LE
ˇ
SAJA, AND K. TAS¸, Generalized diamond-
α
dynamic
Opial inequalities, Adv. Difference Equ., pages 2012: 109, 9, 2012.
[4] P. R. B
EESACK, On an integral inequality of Z. Opial, Trans. Amer. Math. Soc., 104: 470–475, 1962.
[5] M. B
OHNER AND O. DUMAN, Opial-type inequalities for diamond-alpha derivatives and integrals
on time scales, Differ. Equ. Dyn. Syst., 18 (1–2): 229–237, 2010.
[6] M. B
OHNER AND B. K AYMAKC¸ ALAN, Opial inequalities on time scales, Ann. Polon. Math., 77 (1):
11–20, 2001.
[7] M. B
OHNER AND A. PETERSON, Dynamic Equations on Time Scales: An Intr oduction with Applica-
tions,Birkh¨auser, Boston, 2001.
[8] M. B
OHNER AND A. PETERSON, Advances in Dynamic Equations on Ti me Scales,Birkh¨auser,
Boston, 2003.
[9] B. K
ARPUZ,B.KAYMAKC¸ ALAN, AND
¨
O.
¨
O
CALAN, A generalization of Opial’s inequality and
applications to second-order dynamic equations, Differ. Equ. Dyn. Syst., 18 (1–2): 11–18, 2010.
[10] A. L
ASOTA, A discrete boundary value pr oblem, Ann. Polon. Math., 20: 183–190, 1968.
[11] D. M
OZYRSKA AND D. F. M. TORRES, A study of diamond-alpha dynamic equations on regular time
scales, Afr. Diaspora J. Math. (N.S.), 8 (1): 35–47, 2009.
[12] Z. O
LECH, A simple pr oof of a certain result of Z. Opial, Ann. Polon. Math., 8: 61–63, 1960.
[13] Z. O
PIAL, Sur une in´egalit´e, Ann. Polon. Math., 8: 29–32, 1960.
[14] S. H. S
AKER, Applications of Opial and W irtinger inequalities on zeros of third order differential
equations, Dynam. Systems Appl., 20 (4): 479–494, 2011.
[15] S. H. S
AKER, Lyapunov type inequalities for a second order differential equation with a damping
term, Ann. Polon. Math., 103 (1): 37–57, 2011.
[16] S. H. S
AKER, L y apunov’s type inequalities for fourth-order differential equations, Abstr. Appl. Anal.,
pages Art. ID 795825, 25, 2012.
[17] S. H. S
AKER, New inequalities of Opial’s type on time scales and some of their applications, Discrete
Dyn. Nat. Soc., pages Art. ID 362526, 23, 2012.
[18] S. H. S
AKER, Opial’s type inequalities on time scales and some applications, Ann. Polon. Math., 104
(3): 243–260, 2012.
c
,Zagreb
Paper MIA-18-69
924 MARTI N J. BOHNER,RAMY R. MAHMOUD AND SAMIR H. SAKER
[19] S. H. SAKER, Applications of Opial inequalities on time scales on dynamic equations with damping
terms, Math. Comput. Modelling, 58 (11-12): 1777–1790, 2013.
[20] S. H. S
AKER,R.P.AGARWAL, AND D. O’REGAN, Gaps between zeros of second-order half-linear
differential equations, Appl. Math. Comput., 219 (3): 875–885, 2012.
[21] S. H. S
AKER,R.P.AGARWAL, AND D. O’REGAN, New gaps between zeros of fourth-order differ-
ential equations via Opial inequalities, J. Inequal. Appl., pages 2012: 182, 19, 2012.
[22] S. H. S
AKER,R.P.AGARWAL, AND D. O’REGAN, Properties of solutions of fourth-order differen-
tial equations with boundary conditions, J. Inequal. Appl., pages 2013: 278, 15, 2013.
[23] Q. S
HENG,M.FA DAG,J.HENDERSON , AND J. M. DAV I S , An exploration of combined dynamic
derivatives on time scales and their applications, Nonlinear Anal. Real World Appl., 7 (3): 395–413,
2006.
[24] J. S. W. W
ONG, A discrete analogue of Opial’s inequality, Canad. Math. Bull., 10: 115–118, 1967.
[25] Z. Z
HAO,Y.XU, AND Y. L I, Dynamic inequalities on time scales, Int. J. Pure Appl. Math., 22 (1):
51–58, 2005.
Mathematical Inequalities & Applications
www.ele-math.com
mia@ele-math.com