"I thought {@} would be a good for an empty set because it arguably looks like the empty set symbol" I'm just nitpicking but I don't think this is a good justi

"I thought {@} would be a good for an empty set because it arguably looks like the empty set symbol" I'm just nitpicking but I don't think this is a good justification - If the @ symbol looks like the empty set symbol, then {@} is the set containing the empty set