LINE INTEGRALS AND ARC LENGTH OF CURVES.
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SOME INTUITIVE EXPLANATIONS, AND DEFINITIONS.
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There are two versions of these notes. If you are comfortable reading 
documents from a screen, or can print them on a COLOUR printer, then 
I suggest this 
<a href="LineIntegralsRed.pdf">pdf file</a>.
<br>
But if you cannot comfortably deal with documents printed in colour then
you might prefer this 
<a href="LineIntegrals.ps">postscript file</a>.
<br>
If you have problems with both of these files, let me know and I will
find another solution for you.