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 Post subject: Implicit semantics???
PostPosted: Thu, 1 May 2008 01:37:01 UTC 
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Joined: Thu, 28 Oct 2004 00:52:49 UTC
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Location: Bolton, England
Hi Everyone,

I'm currently struggling with the concept of Implicit semantics within my "Discrete" module (also known as Computational Mathematics). As a Software Engineer I can relate most of the function/algorithmic areas. However the same cannot be said for implicit!

I'm struggling in particular with the following question.

Quote:
A function G is described with implicit semantics as follows

G: Stack(\mathbb{N}) x Stack(\mathbb{N}) \rightarrow Stack(\mathbb{N})

\qquad(s,t) \mapsto \sigma

domain: NOT(ISEMPTYSTACK(s)) AND NOT(ISEMPTYSTACK(t))

where: TOP (\sigma) = TOP (t) and POP(\sigma) = POP (s)

If s=<1,2,3> and t=<4,5>, evaluate G (s,t)


Regards,

Lee


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PostPosted: Thu, 1 May 2008 12:58:37 UTC 
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Joined: Thu, 29 Mar 2007 12:41:51 UTC
Posts: 12
Location: Wigan, England
Hi Lee,
Is it not

Top(σ) =top(t)=5
And
Pop(σ)=pop(s)=2,3

Therefore σ=2,3,5
Hence G(s,t)=2,3,5

Not sure this helps, its a bit new to me, but its a starter. Perhaps someone could confirm


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