User:Michael Hardy/templates within templates

Putting the "ref" template inside the "cquote" template can occasion technical difficulties. The solution below was proposed by user:Ligulem. Michael Hardy 00:07, 18 September 2006 (UTC)

Excerpt from Henri Poincaré:

“ The essential point, established by Lorentz, is that the equations of the electromagnetic field are not altered by a certain transformation (which I will call by the name of Lorentz) of the form²:

$x^{\prime }=k\ell \left(x+\varepsilon t\right),t^{\prime }=k\ell \left(t+\varepsilon x\right),y^{\prime }=\ell y,z^{\prime }=\ell z,k=1/{\sqrt {1-\varepsilon ^{2}}}.$

”

Notes

^2 Lorentz (1904) had written $x^{\prime }=k\ell x^{\prime \prime },$ $t^{\prime }=\ell t/k-k\ell wx^{\prime \prime }/c^{2},$ $k^{2}=c^{2}/\left(c^{2}-w^{2}\right)$. Later in the paper he deduced that $\ell =1.$ Lorentz's $x^{\prime \prime }$ was, in Poincaré's notation, equal to $x-wt.$ Eliminating $x^{\prime \prime }$ and putting $\varepsilon =-w/c$ yields the Lorentz transformations as Poincaré wrote them.