##### International Electronic Journal of Geometry
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e-ISSN 1307-5624 | Period Biannually | Founded: 2008 | Publisher Kazım İLARSLAN |

International Electronic Journal of Geometry (IEJG) is a fully-refereed electronic journal.

IEJG is devoted to the high quality publication of current research developments in the fields of geometry, and in all interdisciplinary areas in mathematics which use geometric methods and investigate geometrical structures.

IEJG has an Open Access policy: all content is freely available without charge to the users. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author.

All of the articles published in the journal are assigned with Digital Object Identifier (DOI). This journal is indexed in CrossrefThe journal is published twice a year (April and October).

Int. Electron. J. Geom. is indexed/abstracted by Emerging Sources Citation Index (ESCI), MathSciNet, Zentralblatt MATH, Tr Dizin.

## International Electronic Journal of Geometry

e-ISSN 1307-5624 | Period Biannually | Founded: 2008 | Publisher Kazım İLARSLAN |

International Electronic Journal of Geometry (IEJG) is a fully-refereed electronic journal.

IEJG is devoted to the high quality publication of current research developments in the fields of geometry, and in all interdisciplinary areas in mathematics which use geometric methods and investigate geometrical structures.

IEJG has an Open Access policy: all content is freely available without charge to the users. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author.

All of the articles published in the journal are assigned with Digital Object Identifier (DOI). This journal is indexed in CrossrefThe journal is published twice a year (April and October).

Int. Electron. J. Geom. is indexed/abstracted by Emerging Sources Citation Index (ESCI), MathSciNet, Zentralblatt MATH, Tr Dizin.

Issues
Volume 14 - Issue 1 - Apr 15, 2021
1. Inquiries into the Idea of Space: Aurel Bejancu, A Biographical Note
Pages 1 - 5
Bogdan SUCEAVA
2. Recent Developments in Wintgen Inequality and Wintgen Ideal Submanifolds
Pages 6 - 45
Bang-yen CHEN
3. Some Results on Statistical Hypersurfaces of Sasakian Statistical Manifolds and Holomorphic Statistical Manifolds
Pages 46 - 58
Feng WU, Yan JIANG, Liang ZHANG
4. On the Moduli Space of Flat Tori Having Unit Area
Pages 59 - 65
İsmail SAĞLAM
5. Splitting of the Einstein Field Equations with Respect to the $(1+1+3)$ Threading of a $5D$ Universe
Pages 66 - 84
Aurel BEJANCU, Hani Reda FARRAN
6. A Note on Gradient Solitons in Three-Dimensional Riemannian Manifolds
Pages 85 - 90
Fatemah MOFARREH, U.c. DE
7. The Sampson Laplacian on Negatively Pinched Riemannian Manifolds
Pages 91 - 99
Vladimir ROVENSKİ, Sergey STEPANOV, Irina TSYGANOK
8. Remarks on Einstein Solitons with Certain Types of Vector Field
Pages 100 - 105
9. Canal Surface Whose Center Curve is a Hyperbolic Curve with Hyperbolic Frame
Pages 106 - 120
Ali UÇUM
10. Remarks on Scalar Curvature and Concircular Field Equation
Pages 121 - 124
Ramesh SHARMA, Sharief DESHMUKH
11. Three-Dimensional CR Submanifolds in $S^6(1)$ with Umbilical Direction Normal to $\mathcal{D}_3$
Pages 125 - 131
Djordje KOCİC, Miroslava ANTİC
12. Differential Geometry of Curves in Euclidean 3-Space with Fractional Order
Pages 132 - 144
Muhittin Evren AYDIN, Mehmet BEKTAŞ, Alper ÖĞREMİŞ, Asıf YOKUŞ
13. The Determinant Inner Product and the Heisenberg Product of $Sym(2)$
Pages 145 - 156
Mircea CRASMAREANU
14. Some Results of $f$-Harmonic and Bi-$f$-Harmonic Maps with Potential
Pages 157 - 166
15. The Deformation of an $(\alpha, \beta)$-Metric
Pages 167 - 173
Laurian-loan PISCORAN, Najafi BEHZAD, Cătălin BARBU, Tabatabaeifar TAYEBEH
16. Some Myers-Type Theorems and Comparison Theorems for Manifolds with Modified Ricci Curvature
Pages 174 - 182
Issa A. KABOYE, Mahamane Mahi HAROUNA, Mahaman BAZANFARÉ
17. Berger Type Deformed Sasaki Metric and Harmonicity on the Cotangent Bundle
Pages 183 - 195
Abderrahim ZAGANE
18. Hyperbolic Raisa Orbits of the Second Order in an Extended Hyperbolic Plane
Pages 194 - 206
Lyudmila N. ROMAKİNA
19. Screen Semi-Invariant Lightlike Submanifolds of Golden Semi-Riemannian Manifolds
Pages 207 - 216
Nergiz POYRAZ
20. On Homogeneous Randers Metrics
Pages 217 - 225