Nazdikshavii sharti

Nazdikshavii sharti, mafhu­mi tahlili matematikist. Agar qa­tori nazdikshavandayu            qatori _n ap qimathoi mutlaqi uzvhoi on tar-

tib dodashuda  i_p| durshavanda boshand, qatori _n shartan nazdik-

shavanda nomida meshavad. Macalan, qatori  shartan nazdikshavanda

meboshad, zero qatori az nimathoi mutlaqi uzvhoi on tartibdodashuda

— (qatori garmoniki) durshavanda ast. Agar qator shartan nazdik- shavanda boshad, qatorhoi az uzvhoi musbat va az uzvhoi manfii on tartib dodashuda durshavandaand. Bo usuli tagyir dodani tartibi uzvhoi qatori shartan nazdikshavanda qatorero tartib dodan mumkin ast, ki on ba adadi malum nazdikshavanda meboshad. Bo in usul qatorhoi durshavandaro niz tartib dodan mumkin ast (teoremai Riman). Hangomi uzv ba uzv zarb namudani du qatori shartan nazdikshavanda qatori durshavanda tartib dodan mumkin ast. Mafhumi Nazdikshavii shartiro ba qatori vektorho, zarbi beokhir va integralhoi gayrikhos niz umumiyat medihand.