Delta

? (delta) is the fourth letter of. In , delta is worth 4. It derives from dalet.

Use

The symbol? is often used in to indicate one ;
In , formulas ?_n form part of arithmetic hierarchy. In particular, formulas ?_0 are the formulas without ;
The symbol? is used in to measure a total difference; ? generally indicate a local difference;
One notes sometimes in ? the difference in a subtraction, at the time of the energy exchanges in particular;
One notes? the operator of Laplace;
? is used in to note them will hyperons (?⁺⁺?⁺?⁰ and?^-);
The symbol? is used to note the function of Dirac or Function delta ;
? is the symbol of Kronecker ;
In ? indicate the variation;
In , first mixed strategy;
In , the derivative of the price of one compared to that of its credit subjacent;
In , it deltoïde draw its name from its form, which resembles?.
of a river has the shape of this letter (see Delta of the Danube).
In certain apparatuses have in the shape of delta.