Talk:Phase-type distribution

Latest comment: 13 years ago by 129.127.252.4 in topic Limit vs special case

This Phase-type distribution article is in serious need of revision, or perhaps even reversion, or both! It currently sounds like it has being copied from a text book or an original work. Earlier versions are somewhat more readable. Perhaps it has been over-constructed. -- Cameron Dewe 10:05, 7 October 2006 (UTC)Reply

There is a mention of 'hyperexponential distribution' that should probably read 'hypoexponential distribution' in 3.1.2. —Preceding unsigned comment added by 134.221.191.89 (talk) 13:27, 15 October 2007 (UTC)Reply

Limit vs special case

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Is the "constant" distribution really a special case? If so, the definition needs to be changed. The limiting distribution requires an infinite-dimensional matrix ( ), but then the absorbing state can't be state  . It should be state 1.

It would be much easier to say that the constant distribution is not phase-type. (Note that all distributions are the limit of phase type distributions, and so this might server as a useful conter-example, rather than an example. LachlanA (talk) 03:45, 17 November 2008 (UTC)Reply

Easy fix. 129.127.252.4 (talk) 07:49, 20 September 2011 (UTC)Reply

Things to check

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In the box the formula stated for the variance seems to be instead the formula for the mean square. Also much of the article aims to address the case where   is not necessarily zero, but in that case surely the p.d.f. needs to have   adding to it, both in the box and in the main text.Fathead99 (talk) 12:47, 11 November 2009 (UTC)Reply