Power series
These power series emerge basically in investigation, yet in addition happen in combinatorics as producing capacities (a sort of formal force arrangement) and in electrical building (under the name of the Z-change). The natural decimal documentation for genuine numbers can likewise be seen for instance of a force arrangement, with whole number coefficients, yet with the contention x fixed at 1⁄10. In number hypothesis, the idea of p-adic numbers is additionally firmly identified with that of a force arrangement.