I was preparing a table in my research paper where I was having a formula in one column and the name of the Mathematician who discovered it in another column. I also want to cite the paper of the Mathematician where this formula is given besides the Mathematician's name (in the same column). For example,
Ramanujan . However, LaTeX doesn't like it and I am getting errors like
\mdseriesinvalid in math mode
\upshapeinvalid in math mode
which I don't understand.
I would be really grateful if someone can help me with circumventing these errors.