Matematik invariant nazariyasida evektant — bu evektor deb ataladigan differensial operator bilan taʼsir qilish orqali oʻzgarmasdan tuzilgan kontravariant. Evektantlar va evektorlar Sylvester(1854-1895) tomonidan kiritilgan.

Manbalar

tahrir
  • Sylvester, James Joseph (1853), „On the calculus of forms, otherwise the theory of invariants“, The Cambridge and Dublin Mathematical Journal, 8: 257–269
  • Sylvester, James Joseph (1854), „On the calculus of forms, otherwise the theory of invariants“, The Cambridge and Dublin Mathematical Journal, 9: 85–103