* Sample of the day (AmSTex's text command)
@ 1999-09-12 18:55 David Arnold
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From: David Arnold @ 1999-09-12 18:55 UTC (permalink / raw)
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The text command is nice.
$$
k_1,k_2=H\pm\sqrt{H^2-K}
\qquad
\text{where}
\qquad
\left\{
\aligned
K&=\frac{eg-f^2}{EG-F^2}\\
H&=\frac{Eg-2Ff+Ge}{2(EG-F^2)}
\endaligned
\right.
$$
Interspersing text happens often in math mode.
$$
\gather
g=\det(g_{ij})\tag3--2\\
g^{kl}=(k,l)
\text{ entry of the inverse matrix of }
(g_{ij})\tag3--3
\endgather
$$
\bye
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1999-09-12 18:55 Sample of the day (AmSTex's text command) David Arnold
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