Re: Moment's of student's t distribution
- To: mathgroup at smc.vnet.net
- Subject: [mg130268] Re: Moment's of student's t distribution
- From: debguy <johnandsara2 at cox.net>
- Date: Sun, 31 Mar 2013 03:10:50 -0400 (EDT)
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Mathematica isn't built to show you a symbolic equation for everything thing it does. The typical advice is to use Trace to "see what mathematica is doing". The fomula may be right in the Mathematica Book. Certainly on www.Wikipedia.com right? Some formuli are patented and they don't advertise them intentionally. Some are in C / internal solely for efficiency. The older verions of Mathematica had all the functions in .m (notebooks) and you could see them directly. Today more, for one reason or another, they are (in C code) and no .m for it is on the Mathematica DVD. Mathematica has many sites and they sometimes have formulas displayed. If you have an issue it's important to have the exact symbolic formula: you probably need to use your own. Mathematica will change the formula or maybe uses software with a floating formula for many cases. Your not supposed to get yourself in a situation where you need a formula Mathematica is internally using to give you a correct result.