Re: Improvement hints for poor mapping description

On 2008-02-29, Christoph Blanker <CB@xxxxxxxxx> wrote:

\[
FUNC~ x,y,a,b,c ~~\mapsto~~
\begin{array}{lcl}
x &=& ( a * b ) + c \\
Res(y) &=& x_{ w-1 \ldots 0} \\
\end{array}
\]

Thanks

It is difficult to read tour mind and guess what you want to obtain...

THanks for the feedback, it looks at the moment something like:

FUNC x,y,a,b,c ---> x = ( a * b ) + c
Res(y) = (x_(w-1) ... 0 )

This should indicate that I can make a function call that
takes a,b and c as input and produces x,y as output. and the
mapping shows how the output x,y is calculated. I havent had any
better idea until now :(. the problem is also that it is not emphasised
from the text in some way.

Why do you put x and y with the inputs. Is that some weird computer
science convention? And what is Res, or x_(w-1)?

What about something like:
\[
F\colon (a,b,c)\mapsto
(x,y) \text{ where } \begin{cases}
x=( a * b ) + c \\
y=x_{ w-1 \ldots 0}
\end{cases}
\]

This needs amsmath package, I guess.
--
Maarten Bergvelt
.

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