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Topic: What is a projection of an n-tuple?
Replies: 11   Last Post: Jan 26, 2013 11:52 AM

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William Elliot

Posts: 1,598
Registered: 1/8/12
Re: What is a projection of an n-tuple?
Posted: Jan 25, 2013 4:47 AM
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On Thu, 24 Jan 2013, Peter Percival wrote:

> Writing <...> for an ordered n-tuple; is the second projection of
> <x,y,z> y or <y>?


pi_2(<x,y,z>) = y

pi_2({<x,y,z>}) = {y}





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