While writing a paper, I find myself exhausted with superscript symbols to denote similar types of variables. I have used
x^\ast (i.e. x*),
x'. I can't use symbols which sit right on top of 'x' such as
\bar etc. Neither can I use a new variable (like y or z) for a new quantity related to x. I must also not use a number or an alphabet for the superscript.
I saw some people using alternatives such as big asterisk/star, a club or diamond in the superscript. But these symbols stand out in the text to the extent that they give the text a garish look.
Although I did notice a number of other star/asterisk-related symbols in the comprehensive latex symbol guide, I was not sure which of them is a conventional math superscript.
Any suggestions about using a few more (= 2 or 3) decent superscript symbols? Are there any other commonly used math symbols to solve this problem? Any help will be greatly appreciated. Thanks.
Correction: I am using matrix pseudoinverse in the paper. So,
\dagger symbol has also been used.