| Inquiries into the Idea of Space: Aurel Bejancu, A Biographical Note | Bogdan D. Suceav˘a | 1–5 |
| Recent Developments in Wintgen Inequality and Wintgen Ideal Submanifolds | Bang-Yen CHEN | 6–45 |
| Some Results on Statistical Hypersurfaces of Sasakian Statistical Manifolds and Holomorphic Statistical Manifolds | Feng WU, Yan JİANG, Liang ZHANG | 46–58 |
| On the Moduli Space of Flat Tori Having Unit Area | İsmail SAĞLAM | 59–65 |
| Splitting of the Einstein Field Equations with Respect to the (1 + 1 + 3) Threading of a 5D Universe | Aurel BEJANCU, Hani Reda FARRAN | 66–84 |
| Splitting of the Einstein Field Equations with Respect to the $(1+1+3)$ Threading of a $5D$ Universe | Aurel BEJANCU, Hani Reda FARRAN | 66–84 |
| A Note on Gradient Solitons in Three-Dimensional Riemannian Manifolds | Uday CHAND DE, Fatemah MOFARREH | 85–90 |
| The Sampson Laplacian on Negatively Pinched Riemannian Manifolds | Vladimir ROVENSKI, Sergey STEPANOV, Irina TSYGANOK | 91–99 |
| Remarks on Einstein Solitons with Certain Types of Vector Field | Adara BLAGA, Dan RADU LA¸TCU | 100–105 |
| Canal Surface Whose Center Curve is a Hyperbolic Curve with Hyperbolic Frame | Ali UÇUM | 106–120 |
| Remarks on Scalar Curvature and Concircular Field Equation | Ramesh SHARMA, Sharief DESHMUKH | 121–124 |
| Three-Dimensional CR Submanifolds in S6(1) with Umbilical Direction Normal to D3 | Miroslava ANTI´C, Djordje KOCI´C | 125–131 |
| Three-Dimensional CR Submanifolds in $S^6(1)$ with Umbilical Direction Normal to $\mathcal{D}_3$ | Miroslava ANTİC, Djordje KOCİC | 125–131 |
| Differential Geometry of Curves in Euclidean 3-Space with Fractional Order | Asıf YOKUŞ, Muhittin Evren AYDIN, Mehmet BEKTAŞ, Alper OSMAN ÖĞRENMİŞ | 132–144 |
| The Determinant Inner Product and the Heisenberg Product of Sym(2) | Mircea CRASMAREANU | 145–146 |
| The Determinant Inner Product and the Heisenberg Product of $Sym(2)$ | Mircea CRASMAREANU | 145–156 |
| Some Results of f-Harmonic and Bi-f-Harmonic Maps with Potential | Zegga KADDOUR | 157–166 |
| Some Results of $f$-Harmonic and Bi-$f$-Harmonic Maps with Potential | Zegga KADDOUR | 157–166 |
| The Deformation of an ( ; )-Metric | Pi¸scoran LAURIAN-IOAN, Behzad NAJAFI, Barbu C˘AT˘A LIN, Tayebeh TABATABAEIFAR | 167–173 |
| The Deformation of an $(\alpha, \beta)$-Metric | Laurian-loan PISCORAN, Najafi BEHZAD, Cătălin BARBU, Tabatabaeifar TAYEBEH | 167–173 |
| Some Myers-Type Theorems and Comparison Theorems for Manifolds with Modified Ricci Curvature | Issa A. KABOYE, Harouna M. MAHI, Mahaman BAZANFARÉ | 174–182 |
| Berger Type Deformed Sasaki Metric and Harmonicity on the Cotangent Bundle | Abderrahim ZAGANE | 183–195 |
| Hyperbolic Raisa Orbits of the Second Order in an Extended Hyperbolic Plane | Lyudmila N. ROMAKINA | 196–206 |
| Screen Semi-Invariant Lightlike Submanifolds of Golden Semi-Riemannian Manifolds | Nergiz ÖNEN POYRAZ | 207–216 |
| On Homogeneous Randers Metrics | Akbar SADIGHI, Megerdich TOOMANIAN, Behzad NAJAFI | 217–225 |
| A Note on Centres in a Chain of Circles | Ákos G.HORVÁTH | 226–230 |