(linear algebra) Alternative spelling of antidiagonal.

(historical) A kind of astronomical diagram used to tell time in Ancient Egypt.

plural of diagonal calendar

(finance) In derivatives trading, an options spread position having features of both a calendar spread and a vertical spread. It is established by simultaneously buying and selling equal amount of option contracts of the same type (call or put) but with different strike prices and expiration dates.

plural of diagonal spread

A proof, developed by Georg Cantor, to show that the set of real numbers is uncountably infinite.

(mathematics, number theory) In the theory of magic squares, a set of n cells forming two parallel diagonal lines in the square.

plural of broken diagonal

Synonym of antidiagonal

Synonym of antidiagonal