We find what condition on gradient vector fields characterizes warped products, Riemannian products and round spheres. To do this we apply the theory of Jacobi equations without conjugate points to ...

Abstract: We propose a generalized gradient vector field based two-stage affine snakes method for the segmentation of optic nerve head in retinal fundus images. We obtain the course segmentation using ...

In the present article we find the nature of N(κ)-contact metric manifolds admitting Riemann solitons with some restrictions on the potential vector fields. The cases, when the potential vector field ...

Hello! It's been a while but I have a new question! I would like to use the orientation of the lithology (i.e. the direction of greatest dip) in each grid cell as an ...