Is there a one line way to remove dollar signs from a string via sed?
echo $line

{On the image of {$p$}-adic regulators},

echo $line | sed 's/$//g'

{On the image of {p}-adic regulators},

title=`echo $line | sed 's/$//g'`; echo $title

{On the image of {$p$}-adic regulators},

title=`echo $line | sed 's/\$//g'` # note two backslashes before $

[lsc@aphek]$ echo ${line//$/}
{On the image of {p}-adic regulators},

[me@home]$ title=$(echo $line | sed 's/$//g'); echo $title
{On the image of {p}-adic regulators},

[jaypal:~/Temp] awk '{gsub(/$/,"",$0);print}' <<< $line
{On the image of {p}-adic regulators},

[jaypal:~/Temp] title=$(awk '{gsub(/$/,"",$0);print}' <<< $line); echo $title
{On the image of {p}-adic regulators},