165.1 Lesson map
This lesson proves the next three lemmas from the extension roadmap.
- Recap:
- Dynkin’s π-λ Theorem
Measure Theoretic Probability - Jem Corcoran
April 17, 2026
measure theory, probability, sigma algebra, outer measure, lemmas
This lesson proves the next three lemmas from the extension roadmap.
---
title: "l20 : Dynkin's π-λ Theorem"
subtitle: "Measure Theoretic Probability - Jem Corcoran"
date: 2026-04-17
keywords: [measure theory, probability, sigma algebra, outer measure, lemmas]
---
::: {#vid-C99-l20 .column-margin}
{{< video https://youtu.be/d83SdJvFt1M >}}
Lesson 20: Dynkin's π-λ Theorem
:::
## Lesson map
This lesson proves the next three lemmas from the extension roadmap.
- Recap:
- Dynkin's π-λ Theorem
:::{.column-margin #fig-l20-slide-01}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-02}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-03}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-04}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-05}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-06}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-07}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-08}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-09}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-10}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-11}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-12}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-13}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-14}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-15}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-16}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-17}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-18}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-19}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-20}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-21}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-22}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-23}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-24}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-25}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-26}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::
:::{.column-margin #fig-l20-slide-27}
{fig-alt="me with alternative without math." group="slides"}
And me with a longer caption that is more descriptive of the image, and can replace the image if it doesn't load.
:::

























