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Add appendix slides on CGT
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stanmart committed Oct 5, 2024
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:::


## The Shapley-value
## The Shapley-value {#sec-cgt-shapley-value}

:::: {.columns}

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$\{A_1, A_2\}$ | 2
$\{P, A_i\}$ | 3
$\{P, A_1, A_2\}$ | 6

::: {.crossref}
Core: @sec-cgt-core

Nucleolus: @sec-cgt-nucleolus
:::

:::

::::
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:::


# Appendix – CGT {visibility="uncounted" .unnumbered .unlisted}


## The core {visibility="uncounted" #sec-cgt-core}

:::: {.columns}

::: {.column width="50%"}

There are no profitable deviations

::: {.fragment .smaller}
$$
\begin{aligned}
\pi_P &\geq 0 \\
\pi_{A_i} &\geq 1 \\
\pi_{A_1} + \pi_{A_2} &\geq 2 \\
\pi_{P} + \pi_{A_i} &\geq 3
\end{aligned}
$$
:::

::: {.fragment .smaller}
May be multi-valued, e.g.:

| $\pi_P$ | $\pi_{A_1}$ | $\pi_{A_2}$ |
|:--------:|:-----------:|:-----------:|
| 2 | 2 | 2 |
| 0 | 3 | 3 |
| 3 | 2 | 1 |
:::

:::

::: {.column width="10%"}
:::

::: {.column width="40%" .smaller}

Players: $$N = \{P, A_1, A_2\}$$

Characteristic function $v(S)$:

Coalition ($S$) | Profits
----------|---------:
$\{P\}$ | 0
$\{A_i\}$ | 1
$\{A_1, A_2\}$ | 2
$\{P, A_i\}$ | 3
$\{P, A_1, A_2\}$ | 6
:::

::: {.crossref}
🔙 @sec-cgt-shapley-value
:::

::::


## The nucleolus {visibility="uncounted" #sec-cgt-nucleolus}

:::: {.columns}

::: {.column width="50%"}

Maximize smallest excess

::: {.r-stack}

::: {.fragment .smaller fragment-index=1 .fade-in-then-out}
Excess: payoff – value
$$
\begin{aligned}
e({P}) &= \pi_P \mathrel{\phantom{=2}} \\
e({A_i}) &= \pi_{A_i} - 1 \mathrel{\phantom{=1}} \\
e({P, A_i}) &= \pi_P + \pi_{A_i} - 3 \mathrel{\phantom{=1}} \\
e({A_1, A_2}) &= \pi_{A_1} + \pi_{A_2} - 2 \mathrel{\phantom{=2}}
\end{aligned}
$$
:::

::: {.fragment .smaller fragment-index=2 .fade-in}
Excess: payoff – value
$$
\begin{aligned}
e({P}) &= \pi_P \mathrel{\color{RoyalBlue}{=2}} \\
e({A_i}) &= \pi_{A_i} - 1 \mathrel{\color{RoyalBlue}{=1}} \\
e({P, A_i}) &= \pi_P + \pi_{A_i} - 3 \mathrel{\color{RoyalBlue}{=1}} \\
e({A_1, A_2}) &= \pi_{A_1} + \pi_{A_2} - 2 \mathrel{\color{RoyalBlue}{=2}}
\end{aligned}
$$
:::

:::

::: {.fragment .smaller fragment-index=2}
Unique and contained in the core:
$$
\pi_P = \pi_{A_1} = \pi_{A_2} \mathrel{\color{RoyalBlue}= 2}
$$
:::

:::

::: {.column width="10%"}
:::

::: {.column width="40%" .smaller}

Players: $$N = \{P, A_1, A_2\}$$

Characteristic function $v(S)$:

Coalition ($S$) | Profits
----------|---------:
$\{P\}$ | 0
$\{A_i\}$ | 1
$\{A_1, A_2\}$ | 2
$\{P, A_i\}$ | 3
$\{P, A_1, A_2\}$ | 6
:::

::: {.crossref}
🔙 @sec-cgt-shapley-value
:::

::::


# Appendix – Chapter 1 {visibility="uncounted" .unnumbered .unlisted}

## Special case: weighted value {visibility="uncounted" #sec-weighted-value}
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