If I write
\big( -1 \big), then I get largish spaces around the minus sign. It's as if TeX is treating the opening parenthesis as an operand, so I get the same spacing that I would get in
a - b. Regular
(-1) works fine, so it seems to be the "big" qualifier that's causing the trouble.
Is this the expected behavior? Is there some workaround that will give me the correct spacing?