2.3.2.4 Mathematical operators

Some databases and Internet search tools such as Google and ACM Digital Library use mathematical operators to combine search terms.

Mathematical operators are the plus symbol (+) and the minus symbol (-).

The plus symbol (+) in front of a term (no spaces) requires that term to be in the returned record and is therefore similar in concept to the AND operator.

The minus symbol (-) in front of a term requires that word to be excluded from the search results and therefore similar in concept to the NOT operator.

Note: Remember to check the Help screens of the search tool to determine what operators are valid.