Google? The Page Rank algorithm is basically Linear Algebra. ButI think you're asking the wrong question. You're doing the equivalent of a 14-year-old saying

Google? The Page Rank algorithm is basically Linear Algebra. ButI think you're asking the wrong question. You're doing the equivalent of a 14-year-old saying "When am I ever going to need this?" Sometimes the benefits are much more nebulous and intangible - they affect the way you think, and the way you approach problems. Most programming doesn't use advanced math, but advanced math helps you do the programming. (Note - all the above personal opinion, and I don't have specific studies and citations to back it up)