**Dalam Garapan**:

S. Rante, A. Adam, and H. Gunawan*, On inner products derived from the standard *n*-inner product on an inner product space, to be submitted

**Hasil Penelitian 2020**:

H. Rahman and H. Gunawan*, Generalized Von Neumann-Jordan constant for Morrey spaces and small Morrey spaces, submitted (*supported by RIK-A ITB)

H. Gunawan* and Ifronika*, Von Neumann-Jordan constant for weak Orlicz spaces and weak Lebesgue spaces, to be submitted (*supported by RIK-A ITB)

L. Widyatma*, Karakterisasi ruang hasil kali dalam menggunakan konstanta Dunkl-Williams, to be submitted (*supported by RIK-A ITB)

N.K. Tumalun*, D.I. Hakim, and H. Gunawan*, Weak solution existence of ellptic PDEs in generalized Morrey spaces, to be submitted (*supported by RIK-A ITB)

M. Nur and H. Gunawan*, A note on the g-angle between subspaces of a normed space, *Aequat. Math.* (*supported by RIK-A ITB)

H. Gunawan*, D.I. Hakim, and A.S. Putri*, On geometric properties of Morrey spaces, *UFA Math. J*. (*supported by P3MI ITB)

I. Sihwaningrum, S. Maryani, and H. Gunawan*, Extension of Hardy-Littlewood-Sobolev inequalties for Riesz potentials on hypergroups, *Mediter. J. Math.* (*supported by P3MI ITB)

***

**Hasil Penelitian 2019:**

H. Gunawan, E. Kikianty, Y. Sawano, and C. Schwanke, Three geometric constants for Morrey spaces, *Bull. Korean Math. Soc.*

N.K. Tumalun, D.I. Hakim, and H. Gunawan, Fefferman’s inequality and unique continuation property of elliptic partial differential equations, submitted

H. Batkunde and H. Gunawan, Bounded linear functional on *n*-normed spaces through its quotient spaces, *Internat. J. Appl. Phys. Math.*

H. Batkunde and H. Gunawan, A revisit to *n*-normed spaces through its quotient spaces, Mat. Stud.

M. Nur and H. Gunawan, Three equivalent n-norms on the space of *p*-summable sequences, *Fundam. J. Math. Appl.*

***

**Periode 2016-2020:**

2016: A new 2-inner product on the space of *p*-summable sequences (with S. Konca and M. Idris)

2016: The boundedness of Bessel-Riesz operators on Morrey spaces (with M. Idris, J. Lindiarni, and Eridani)

2016: The boundedness of Bessel-Riesz operators on generalized Morrey spaces (with M. Idris and Eridani)

2016: Inclusion properties of Orlicz and weak Orlicz spaces (with A.A. Masta and W. Setya-Budhi)

2017: On the Fundamental Theorem of Arithmetic and Euclid’s Theorem

2017: The boundedness of generalized Bessel-Riesz operators on generalized Morrey spaces (with M. Idris)

2017: Inclusion properties of generalized Morrey spaces (with D.I. Hakim, K.M. Limanta, and A.A. Masta)

2017: An inclusion property of Orlicz-Morrey spaces (with A.A. Masta and W. Setya-Budhi)

2017: On inclusion properties of two versions of Orlicz-Morrey spaces (with A.A. Masta and W. Setya-Budhi)

2018: *n*-Normed spaces with norms of its quotient spaces (with H. Batkunde)

2018: Discrete Morrey spaces and their inclusion properties (with E. Kikianty and C. Schwanke)

2018: On inclusion relation between weak Morrey spaces and Morrey spaces (with D.I. Hakim, E. Nakai, and Y. Sawano)

2018: The Hardy and Heisenberg inequalities in Morrey spaces (with D.I. Hakim, E. Nakai, and Y. Sawano)

2018: Proper inclusion of Morrey spaces (with D.I. Hakim and M. Idris)

2018: A formula for the *g*-angle between two subspaces of a normed space (with M. Nur and O. Neswan)

2018: Generalized Holder’s inequality in Morrey spaces (with Ifronika, M. Idris, and A.A. Masta)

2018: Norm estimates for Bessel-Riesz operators on generalized Morrey spaces (with M. Idris)

2018: A new orthogonality and angle in a normed space (with M. Nur)

2019: Konsep garis singgung pada kurva (with V. Deviantri)

2019: The Hardy-Littlewood maximal operators on discrete Morrey spaces (with C. Schwanke)

2020: Inclusion between generalized Stummel classes and other function spaces (with N.K. Tumalun and D.I. Hakim)

***

**Periode 2011-2015:**

2011: On the product of *N* Chebyshev systems (with L. Ambarwati)

2011: Surfaces with prescribed nodes and minimum energy integral of fractional order (with E. Rusyaman and L. Ambarwati)

2011: Application of Reproducing Kernel Hilbert Spaces to a minimization problem with prescribed nodes (with Y. Sawano)

2012: Weak type inequalities for fractional integral operators on generalized non-homogeneous Morrey spaces (with I. Sihwaningrum and S. Maryani)

2012: A characterization for fractional integral operators on generalized Morrey spaces (with Eridani and M.I. Utoyo)

2012: Generalized Stummel class and Morrey spaces (with E. Nakai, Y. Sawano, and H. Tanaka)

2013: On the space of *p*-summable sequences (with M. Idris and S. Ekariani)

2013: The local trace inequality for potential type integral operators (with H. Tanaka)

2013: Two equivalent *n*-norms on the space of *p*-summable sequences (with R.A. Wibawa-Kusumah)

2013: Equivalence relations of *n*-norms on a vector space (with T.R. Kristianto and R.A. Wibawa-Kusumah)

2013: A contractive mapping theorem on the *n*-normed space of *p*-summable sequences (with S. Ekariani and M. Idris)

2013: Bounded linear functionals on the *n*-normed space of *p*-summable sequences (with H. Batkunde and Y.E.P. Pangalela)

2013: The *n*-dual space of the space of *p*-summable sequences (with Y.E.P. Pangalela)

2013: Multilinear maximal functions and fractional integrals on generalized Morrey spaces (with I. Sihwaningrum)

2013: Weak (*p*,*q*) inequalites for fractional integral operators on generalized Morrey spaces of non-homogeneous type (with D.I. Hakim)

2013: Weak type inequalities for some integral operators on generalized nonhomogeneous Morrey spaces (with D.I. Hakim, Y. Sawano, and I. Sihwaningrum)

2014: Characterizations for the gereralized fractional integral operators on Morrey spaces (with Eridani, E. Nakai, and Y. Sawano)

2014: Morrey spaces and Related Function Spaces (with Y. Sawano, V. Guliyev, and H. Tanaka)

2014: Some remarks on *l^p* as an *n*-normed space (with S. Konca and M. Basarir)

2015: *p*-summable sequence spaces with inner products (with S. Konca and M. Idris)

2015: *p*-summable sequence spaces with 2-inner products (with S. Konca, M. Idris, and M. Basarir)

2015: On the *n*-normed space of *p*-integrable functions (with S. Ekariani and M. Idris)

2015: Weak type inequalities for some operators on generalized Morrey spaces over metric measure spaces (with I. Sihwaningrum and A. Wardayani)

2015: Non-smooth atomic decomposition for generalized Orlicz-Morrey spaces (with Y. Sawano and D.I. Hakim)

2015: Fixed point theorems on bounded sets in an *n*-normed spaces (with E. Sukaesih and O. Neswan)

2015: A partial solution to an open problem in *n*-normed spaces (with M. Idris and S. Konca)

***

**Periode 2006-2010:**

2006: Orthogonality in 2-normed spaces revisited (with Mashadi, S. Gemawati, N. Supiamin, and I. Sihwaningrum)

2006: Orthogonality in *n*-normed spaces (with E. Kikianty, Mashadi, S. Gemawati, and I. Sihwaningrum)

2007: On integrals arising from a Lie group contraction problem (with S. Gupta)

2008: P-, I-, g-, and D-angles in normed spaces (with J. Lindiarni and O. Neswan)

2008: An interpolation method that minimizes an energy integral of fractional order (with F. Pranolo and E. Rusyaman)

2009: Fractional integrals and generalized Olsen inequalities (with Eridani)

2009: Fractional integral operators in non-homogeneous spaces (with Y. Sawano and I. Sihwaningrum)

2010: Fractional integrals and Olsen inequalities on nonhomogeneous spaces (with I. Sihwaningrum and H.P. Suryawan)

2010: Equivalence of *n*-norms on the space of *p*-summable sequences (with A, Mutaqin)

2010: On *n*-norms and bounded *n*-linear functionals in a Hilbert space (with S.M. Gozali and O. Neswan)

2010: On *b*-orthogonality in 2-normed spaces (with S.M. Gozali)

***

**Periode 2001-2005**:

2001: On finite dimensional 2-normed spaces (with Mashadi)

2001: An inner product that makes a set of vectors orthonormal

2001: On *n*-normed spaces (with Mashadi)

2001: The space of *p*-summable sequences and its natual *n*-norm

2002: Some estimates for imaginary powers of Laplace operators

2002: Weighted estimates for fractional maximal functions related to spherical means (with M. Cowling and J. Garcia-Cuerva)

2002: Inner products on *n*-inner product spaces

2002: On convergence in *n*-inner product spaces

2002: A generalization of Bessel’s inequality and Parseval’s identity

2002: On *n*-inner products, *n*-norms, and the Cauchy-Schwarz inequality

2002: A note on Dragomir-Mcandrew’s trapezoid inequality

2003: A note on the generalized fractional integral operators

2003: On measures of central location

2004: On the behavior of the solution of the wave equation (with W. Setya-Budhi)

2004: On generalized fractional integral operators (with Eridani and E. Nakai)

2005: Stummel class and Morrey spaces (with Eridani)

2005: A formula for angles between subspaces of inner product spaces (with O. Neswan and W. Setya-Budhi)

2005: On angles between subspaces of inner product spaces (with O. Neswan)

2005: On volumes of *n*-dimensional parallelepipeds in *l^p* spaces (with W. Setya-Budhi, Mashadi, and S. Gemawati)

***

**Periode 1992-2000**:

1992: A generalization of maximal functions on compact semisimple Lie groups

1993: *L²*-estimates for some maximal functions

1996: On weighted estimates for Stein’s maximal function

1997: On finding the fundamental dominant weights of a root system

1998: Some weighted estimates for Stein’s maximal function

2000: On the triangle inequality for the standard 2-norm (with W. Setya-Budhi)

***

* Unpublished Papers*:

2016: On the fundamental theorem of arithmetic and Euclid’s theorem

2006: Orthogonality in *n*-normed spaces

**See also**: https://scholar.google.co.id/citations?user=U9ZCm_YAAAAJ&hl=id&oi=ao and http://itb.academia.edu/HendraGunawan