From: Mark Wooding <mdw@distorted.org.uk>
Date: Sat, 9 Jan 2021 02:17:00 +0000 (+0000)
Subject: rolling-eqn.html: Use `\ell' for `l' in mathematics.
X-Git-Url: https://git.distorted.org.uk/~mdw/dep-ui/commitdiff_plain/aca28a1d25ea50c837b2699964ef3c53f449f0c1

rolling-eqn.html: Use `\ell' for `l' in mathematics.

It's rather clearer.
---

diff --git a/rolling-eqn.html b/rolling-eqn.html
index 4b5a973..c2383c4 100644
--- a/rolling-eqn.html
+++ b/rolling-eqn.html
@@ -34,10 +34,10 @@ bit, so a round wire with diameter&nbsp;$D$ ought to work as well as
 square wire with side $S$ if $S^2 = \pi D^2/4$, i.e.,
 \[ D = \sqrt{\frac{4 S^2}{\pi}} = \frac{2 S}{\sqrt\pi} \,\text{.} \]
 Volume is conserved, so if the original and final wire lengths
-are&nbsp;$L$ and&nbsp;$l$ respectively, then
-\[ L S^2 = l w t \,\text{,} \]
+are&nbsp;$L$ and&nbsp;$\ell$ respectively, then
+\[ L S^2 = \ell w t \,\text{,} \]
 and hence
-\[ L = \frac{l w t}{S^2} \,\text{.} \]
+\[ L = \frac{\ell w t}{S^2} \,\text{.} \]
 Finally, determining the required initial stock length&nbsp;$L_0$ given
 its side&nbsp;$S_0$ (for square stock) or diameter&nbsp;$D_0$ (for
 round) again makes use of conservation of volume: