A new mathematical direction is presented. Sub-interval analysis is a simple and effective tool for practical and theoretical calculations and estimations. Feasible applications of sub-interval analysis include economics (accounting, auditing, microeconomics, macroeconomics, banking, insurance, utility theory, econometrics, etc.), internet applications (databases, e-stores, e-shops, forums, blogs, search engines, etc.), statistics, Fourier analysis, large databases, preliminary recognition, sociology, elections, military science, engineering, technical sciences and many more.
Mathematics economics microeconomics macroeconomics accounting banking insurance econometrics utility theory Internet Fourier analysis large databases preliminary recognition elections military science engineering