Tangent quaternionic spaceSummary: "A quaternionic
space tangent to an arbitrary differentiable manifold is constructed
Computation of the tangent cone to the image of a mapping at a singular pointThe paper concerns the calculus of the
tangent cone to the set F(N) at the point F
Nonmetricity plane waves in post Riemannian spacetime transformations of the
tangent space, such as the Weyl 1-form, the trace 1-form, and the symmetric 1-form
Higher-order extremum conditions and tangent vectors at an abnormal point this result to abnormal cases (when the Lyusternik theorem does not describe the
tangent space), focusing