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Re: Question regarding <ci>

From: David Carlisle <davidc@nag.co.uk>
Date: Fri, 23 Nov 2001 15:45:42 GMT
Message-Id: <200111231545.PAA31032@penguin.nag.co.uk>
To: Maksims_Zizkuns@exigengroup.lv
CC: www-math@w3.org

> Is it identifier of something declared somewhere else by <declare> 
> construction or anything also?
> Can <ci> identifier obtain it's value in a way other than <declare>ing ?

The meaning of your MathML expression is the same as the meaning of

2 + x

That is, in some numerical systems it won't mean anything at all unless x
has already been declared, but in other symbolic systems it will be
interpreted as the expression 2 + x. You might have previously (or
later) given x a value, but this is not required. You could process this
expression keeping x as a free variable, for example you could
differentiate it with respect to x and get 2, or square it and get
x^2 + 4x + 4.


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Received on Friday, 23 November 2001 10:46:25 UTC

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