Greek Letter Delta (Δέλτα - Δ)
"Delta" was supposed to be a door, in Semitic "Daleth". It became tilted and one side rounded as the latin "D". The mouth of a river and maybe other triangular things are known as "deltas".
"Δ" Letter in mathematics and in science
- a finite difference
- a difference operator
- the Laplace operator
- the angle that subtends the arc of a circular curve in surveying
- a variation in the calculus of variations
- the Kronecker delta function
- the Dirac delta function
- sensitivity to price in mathematical finance
Greek words with "δ"