Trying to do this pattern match using "ls" and I just can't seem to get it right.
Create a file:
touch synaptic-0.91.3
Using the following commands sequence
packageName="synaptic-0.91.3"
find . -regextype posix-extended -regex '.*[0-9]{1,2}\.[0-9]{1,2}\.[0-9]{1,2}' -print | cut -c3- | grep '^'"${packageName}"
we get the correct result, namely "synaptic-0.91.3".
However, looking at various examples and references, I've tried many different patterns, none of which have worked for application with our humble and straightforward "ls".
The pattern which I expected to work, but doesn't was this:
ls -d "${packageName}"-[[:digit:]]+.[[:digit:]]+.[[:digit:]]+
After a lot of looking around, and wasted time, I located the following method that gives the correct result:
shopt -s extglob
ls -d "${packageName}"-+([0-9]).+([0-9]).+([0-9])
That shopt command is the one that allows us to "link in" extra pattern matching capabilities to match some of those of other languages.
Each "+([0-9])" sequence matches one or more digits, which is what I was trying to get. 
Out of curiosity, I tried the following, and it also gives the correct result:
oomd="+([0-9])"
ls -d "${packageName}"-${oomd}.${oomd}.${oomd}
BUT, the following form will fail because it prevents the shell's action to expand the regular expression:
ls -d "${packageName}-${oomd}.${oomd}.${oomd}"