What is the Infinitesimal sign?

[cheetaman]

What is the Infinitesimal sign?

[swansont]

epsilon

[Trurl]

On 3/23/2018 at 7:27 AM, swansont said:

epsilon

 

I was wondering this the other day. How many infinity symbols are there? There is the car Infinity whose symbol I'm not sure what infinity it is.

I wonder if infinity has the most symbols representing it than any other math symbol.

 

For example this is infinity:

 

 

 

 

[studiot]

On 23/03/2018 at 11:10 AM, cheetaman said:

What is the Infinitesimal sign?

 

Both the small Greek letters epsilon *( ε ) and delta ( δ ) are used.

Sometimes just on their own, when it is necessary to distinguish, as in the so called epsilon - delta proof in mathematical analysis.

Sometimes in conjunction with a variable symbol to denote an infinitesimal increment in that variable as in

δy = f'(x) δx

In this case the distinction is made by the different variable letters and the same infinitesimal symbol is used for both.

Edited March 24, 2018 by studiot