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Topic: Generation of random binary trees
Replies: 10   Last Post: Mar 20, 2014 10:30 AM

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Gordon Sande

Posts: 137
Registered: 5/13/10
Re: Generation of random binary trees
Posted: Feb 28, 2014 7:25 PM
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On 2014-02-28 21:16:49 +0000, Mok-Kong Shen said:

> Am 28.02.2014 18:37, schrieb Herman Rubin:

>> Do you want equally likely labelled trees or equally likely
>> unlabelled ones? For the labelled trees, the method is fairly
>> easy; there are 2^(n-1)! labelled trees with n nodes, and going
>> from n-1 to n can be done by selecting a node at random and
>> branching there. For unlabelled trees, the problem is much
>> harder.

> Unlabelled. BTW, I forgot to mention that I am mainly interested
> in full binary trees (each internal node has exactly two children).

Then there is only one tree for a few special sizes. Or have I missed

> M. K. Shen

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