===== Measurable space =====
==== Set ====
| @#55CCEE: context     | @#55CCEE: $ X $ |
| @#FFBB00: definiendum | @#FFBB00: $ \langle X,\Sigma\rangle\in \mathrm{MeasurableSpace}(X) $ |
| @#55EE55: postulate   | @#55EE55: $ \Sigma \in \mathrm{SigmaAlgebra}(X) $ |

==== Discussion ====
Every σ-algebra gives us a measurable space.

=== Predicates ===

We call a set $X$ //measurable// if there is a sigma-algebra over it.
==== Reference ====
Wikipedia: [[http://en.wikipedia.org/wiki/Sigma-algebra|Sigma-algebra]]
==== Parents ====
=== Equivalent to ===
[[σ-algebra]]