===== Symmetric matrix =====
==== Set ====
| @#55CCEE: context     | @#55CCEE: $X$ | 
| @#55CCEE: context     | @#55CCEE: $n\in\mathbb N$ | 

| @#FFBB00: definiendum | @#FFBB00: $ A \in \mathrm{SymmetricMatrix}(n,X) $ |

| @#55EE55: postulate   | @#55EE55: $ A^\mathrm{T}=A $ |

==== Discussion ====
=== Reference ===
Wikipedia: [[http://en.wikipedia.org/wiki/Symmetric_matrix|Symmetric matrix]]
==== Parents ====
=== Subset of ===
[[Matrix]]
=== Context ===
[[Matrix transpose]]