A tensor is a generalization of scalars, vectors, and matrices to an arbitrary number of indices.

antisymmetric tensor | array | Cartesian tensor | comma derivative | contravariant tensor | covariant derivative | covariant tensor | curl | divergence | gradient | index gymnastics | index lowering | index raising | irreducible tensor | isotropic tensor | Jacobi tensor | matrix | mixed tensor | Ricci curvature tensor | Riemann tensor | scalar | symmetric tensor | tensor contraction | tensor space | torsion tensor | vector | Weyl tensor

graduate school level