There is no hard 2175forals.comematical difference in between the comma (,) and also the semicolon(;).
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The semicolon is used occasionally to optically separate some variable group. For this reason the semicolon is not much more than a reading aid.
The situation can be compared to the consumption of different kind that parentheses, come make complex nestings much more readable.
A semicolon is supplied to different variables native parameters. Quite often, the terms variables and parameters are supplied interchangeably, but with a semicolon the meaning is that we are defining a duty of the parameters the returns a duty of the variables.
For example, if I write $f(x1,x2,\ldots;p1,p2,\ldots)$ then I typical that by offering the parameters $(p1, p2,\ldots)$, I create a new function whose debates are $(x1, x2,\ldots)$.
So the basic syntax is $functionname(variables;parameters)$.
In Noll"s theorem it claims that the role created by offering $\partial \Omega$ is the very same as that produced by giving $\vecN$. That"s quite a nice way of saying that the function created only depends on $\vecN$.
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