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A vector field over $\mathbb{R}^3$ assigns to each point $p$ a vector $v$ belonging to the tangent space $T_p\mathbb{R}^3$ at that point.

Conditions: The ambient space in this example is $\mathbb{R}^3$.

A vector field over $\mathbb{R}^3$ assigns to each point $p$ a vector $v$ belonging to the tangent space $T_p\mathbb{R}^3$ at that point.

Conditions: The ambient space in this example is $\mathbb{R}^3$.

The basepoint $p$ remains important because it determines the linear map $Df(p)$ used in the output pair. The derivative depends on the point at which it is evaluated.

Conditions: Applies to the basepoint derivative $df_p(v) = (q, Df(p)v)$.

The basepoint $p$ remains important because it determines the linear map $Df(p)$ used in the output pair. The derivative depends on the point at which it is evaluated.

Conditions: Applies to the basepoint derivative $df_p(v) = (q, Df(p)v)$.