VectorAround

VectorAround[{x1, x2, …}, {δ 1, δ 2, …}]

VectorAround[{x1, x2, …}, {{Δ 11, Δ 12, …}, {Δ 12, Δ 22, …}, …}]

VectorAround[{x1, x2}, {{δ 1, δ 2}, ρ}]

VectorAround[{x1, x2, …}, {{δ 1, δ 2, …}, {{1, R12, …}, {R12, 1, …}, …}}]