===== Dual vector space =====
==== Set ====
| @#55CCEE: context     | @#55CCEE: $X$...$\mathcal F$-vector space |

| @#FFBB00: definiendum | @#FFBB00: $X^d \equiv \mathcal L(X,\mathcal F)$ |

==== Discussion ====
The elements of $X^d$ are called linear functionals.
==== Parents ====
=== Context ===
[[Linear operator space]], [[Vector space]]