Tangency vis-a'-vis differentiability by Peano, Severi and Guareschi

Tangent Algebras

Tangent and Bernoulli numbers related to Motzkin and Catalan numbers by means of numerical triangles

Tangent and cotangent lifts and graded Lie algebras associated with Lie algebroids

Tangent and normal bundles in almost complex geometry

Tangent bundle and Gauss functor of a combinatorial manifold

Tangent bundles dynamics and its consequences

Tangent bundles in differential lambda-categories

Tangent bundles to sub-Riemannian groups

Tangent Bundles with Sasaki Metric and Almost Hypercomplex Pseudo-Hermitian Structure

Tangent Cone of Numerical Semigroup Rings of Embedding Dimension Three

Tangent cones and regularity of real hypersurfaces

Tangent cones of numerical semigroup rings

Tangent Cones of Schubert Varieties for $A_n$ of lower rank

Tangent cones to positive-(1,1) De Rham currents

Tangent Dirac structures and submanifolds

Tangent Graeffe Iteration

Tangent lifting of deformations in mixed characteristic

Tangent Lifts of Poisson and Related Structures

Tangent lines, inflections, and vertices of closed curves