Index and Stability in Bimatrix Games
| Autor: | H. Arndt von Schemde |
|---|---|
| EAN: | 9783540291022 |
| eBook Format: | |
| Sprache: | Englisch |
| Produktart: | eBook |
| Veröffentlichungsdatum: | 11.12.2005 |
| Untertitel: | A Geometric-Combinatorial Approach |
| Kategorie: | |
| Schlagworte: | Bimatrix Games Index Nash Equilibria Nash equilibrium Stability dynamics equilibrium game theory proof theorem |
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The index of an equilibrium in a game gives information about the `stability` of the equilibrium, for example with respect to game dynamics. Unfortunately, index theory is often very technical. This book presents a new geometric construction that visualises the index in an intuitive way. For example, a 3×n game, for any n, can be represented by a figure in the plane, from which one can read off any equilibrium, and its index as a geometric orientation. With this insight, the index can be characterised in strategic terms alone. Moreover, certain `hyperstable` equilibrium components are seen to have nonzero index. The construction gives an elementary proof that two-player games have a Nash equilibrium, and, in an unusual direction, the powerful fixed point theorem of Brouwer.