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Commit fc905c20 authored by Chris Sangwin's avatar Chris Sangwin
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Update docs.

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......@@ -11,6 +11,7 @@
width: 33.33%;
padding: 10px;
}
/* Responsive layout - makes the three columns stack on top of each other instead of next to each other when close. */
@media screen and (max-width: 605px) {
.footerColumn {
......
......@@ -74,9 +74,17 @@ In Maxima 5.19.1 we get:
(%i2) 6*sqrt(2);
(%o2) 3*2^(3/2)
The discussion of this issue can be followed on the
[Maxima mailing list](http://www.math.utexas.edu/pipermail/maxima/2009/018460.html).
Do you really want to continue using \(\sqrt{}\) in your teaching?
Do you really want to continue using \(\sqrt{}\) in your teaching? In his *Elements of Algebra*, L. Euler wrote the following.
> \(\S 200\) We may therefore entirely reject the radical signs at present made use of, and employ in their stead
> the fractional exponents which we have just explained: but as we have been long accustomed to
> those signs, and meet with them in most books of Algebra, it might be wrong to banish them entirely from
> calculations; there is, however, sufficient reason also to employ, as is now frequently done, the other method of
> notation, because it manifestly corresponds with the nature of the thing. In fact we see immediately
> that \(a^\frac12\) is the square root of \(a\), because we know that the square of \(a^\frac12\), that is to say
> \(a^\frac12\) multiplied by \(a^\frac12\) is equal to \(a^1\), or \(a\).
A lot of elementary mathematics involves converting from one form to another and back again. Sometimes these forms have important differences of use, e.g. factored form or completed square form for a quadratic. However, sometimes these equivalent forms are more customary than because it *"manifestly corresponds with the nature of the thing"* in question. I digress...
### sqrt(-1) {#sqrt_minus_one}
......
......@@ -157,6 +157,13 @@ body.pagelayout-embedded .que.stack .formulation .questiontestslink {
outline: none;
}
blockquote {
border-left: 5px solid #ccc;
margin: 1.5em 10px;
padding: 1em 10px .1em 10px;
quotes: "\201C""\201D""\2018""\2019";
}
/* Support for proof. */
.proof,
.proof-block {
......
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