1. Inquiries into the Idea of Space: Aurel Bejancu, A Biographical Note
   Sayfalar 1 - 5
   Bogdan SUCEAVA
2. Recent Developments in Wintgen Inequality and Wintgen Ideal Submanifolds
   Sayfalar 6 - 45
   Bang-yen CHEN
3. Some Results on Statistical Hypersurfaces of Sasakian Statistical Manifolds and Holomorphic Statistical Manifolds
   Sayfalar 46 - 58
   Feng WU, Yan JIANG, Liang ZHANG
4. On the Moduli Space of Flat Tori Having Unit Area
   Sayfalar 59 - 65
   İsmail SAĞLAM
5. Splitting of the Einstein Field Equations with Respect to the $(1+1+3)$ Threading of a $5D$ Universe
   Sayfalar 66 - 84
   Aurel BEJANCU, Hani Reda FARRAN
6. A Note on Gradient Solitons in Three-Dimensional Riemannian Manifolds
   Sayfalar 85 - 90
   Fatemah MOFARREH, U.c. DE
7. The Sampson Laplacian on Negatively Pinched Riemannian Manifolds
   Sayfalar 91 - 99
   Vladimir ROVENSKİ, Sergey STEPANOV, Irina TSYGANOK
8. Remarks on Einstein Solitons with Certain Types of Vector Field
   Sayfalar 100 - 105
   Adara-monica BLAGA, Dan Radu LAŢCU
9. Canal Surface Whose Center Curve is a Hyperbolic Curve with Hyperbolic Frame
   Sayfalar 106 - 120
   Ali UÇUM
10. Remarks on Scalar Curvature and Concircular Field Equation
    Sayfalar 121 - 124
    Ramesh SHARMA, Sharief DESHMUKH
11. Three-Dimensional CR Submanifolds in $S^6(1)$ with Umbilical Direction Normal to $\mathcal{D}_3$
    Sayfalar 125 - 131
    Djordje KOCİC, Miroslava ANTİC
12. Differential Geometry of Curves in Euclidean 3-Space with Fractional Order
    Sayfalar 132 - 144
    Muhittin Evren AYDIN, Mehmet BEKTAŞ, Alper ÖĞREMİŞ, Asıf YOKUŞ
13. The Determinant Inner Product and the Heisenberg Product of $Sym(2)$
    Sayfalar 145 - 156
    Mircea CRASMAREANU
14. Some Results of $f$-Harmonic and Bi-$f$-Harmonic Maps with Potential
    Sayfalar 157 - 166
    Zegga KADDOUR
15. The Deformation of an $(\alpha, \beta)$-Metric
    Sayfalar 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
    Sayfalar 174 - 182
    Issa A. KABOYE, Mahamane Mahi HAROUNA, Mahaman BAZANFARÉ
17. Berger Type Deformed Sasaki Metric and Harmonicity on the Cotangent Bundle
    Sayfalar 183 - 195
    Abderrahim ZAGANE
18. Hyperbolic Raisa Orbits of the Second Order in an Extended Hyperbolic Plane
    Sayfalar 194 - 206
    Lyudmila N. ROMAKİNA
19. Screen Semi-Invariant Lightlike Submanifolds of Golden Semi-Riemannian Manifolds
    Sayfalar 207 - 216
    Nergiz POYRAZ
20. On Homogeneous Randers Metrics
    Sayfalar 217 - 225
    Akbar SADİGHİ, Megerdich TOOMANİAN, Behzad NAJAFİ
21. A Note on Centres in a Chain of Circles
    Sayfalar 226 - 230
    Akos G.HORVÁTH