子博弈有几个?大家指点一下..新手

两个 ！！！！！！！！！！！！

2 subgames

a subgame of an extensive form game Delta is a subset of the game having the following properties:

1. it begins with an information set containing a single decision node, contains all the decision nodes that are successors (both immediate and latter) of this node, and contains only these nodes;

2. if decision node x is in the subgame, then every x' in H(x) is also, where H(x) is the information set that contains decision node x. (That is, there are no "broken" information sets)

xiexie

谢谢各位长时间的讨论　　我现在都还不是很明白　晕了

刚才还看了谢识予的书

说明了原博弈非子博弈啊..........糊涂了

要看最好就别看中文书, 这个例子和张维迎书里的一模一样.不过张也是东抄西凑的.

原博弈毫无疑问就是个子博弈.

北美比较流行的JEHLE AND RENY那本教科书里,为了简洁地说明SPE的性质,举的例子都是这样的,每个例子还专门弄句话在下面: "THIS GAME HAS ONLY ONE SUBGAME, NAMELY, ITSELF"

以下是引用dufeaaa在2006-12-22 22:31:00的发言：…我现在都还不是很明白　晕了

关键就是，要在子博弈的定义中补入一条：（不光子博弈的起始点是subroot）从原博弈的起始点至子博弈的起始点这段路径上的nodes必须都是subroots。

这样原博弈有且仅有一个子博弈，即原博弈自身。

补充这个内容是为了贯彻SPNE。

糊涂了，越看越乱！！

应该是2个子博弈。

只有一个子博弈