# Index of common sigma-algebras

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## Named [ilmath]\sigma[/ilmath]-algebras

[ilmath]\sigma[/ilmath]-algebra | Notation | Description |
---|---|---|

Borel [ilmath]\sigma[/ilmath]-algebra | [ilmath]\mathcal{B}(X,\mathcal{J})[/ilmath] or [ilmath]\mathcal{B}(X)[/ilmath] if the topology is implicit. | |

Pre-image [ilmath]\sigma[/ilmath]-algebra | (unknown) | |

Trace [ilmath]\sigma[/ilmath]-algebra |