I am using the amsthm
package and get a blank square like $\Square$
at the end of proofs. How can I redefine to get the black Halmos tombstone $\Blacksquare$
instead?
I want the symbol to be right aligned, but it would be useful if I were to be able to switch off the right-alignment.
Best Answer
Redefine
\qedsymbol
:I wouldn't recommend to switch off right alignment for the end-mark (it's not standard, so readers might miss the end-mark and quite franckly, it looks ugly), but you could do something like this:
As barbara beeton mentions in
her comment
, it might be desired to turn off right alignment on a per-case basis; in this case, it's enough to locally redefine\qedsymbol
to be empty and then add the desired symbol at the end (taking some care to prevent undesired line breaks); something along these lines: