Question

what is this mathematical notation in the pic?

Answer 1

I have made a red circle on it

Answer 2

\[\xi\]

\xi

Answer 3

yes

Answer 4

what is the name?

Answer 5

It is a greek letter its name it's XI

Answer 6

xi

Answer 7

And it is used to denote very small numbers I think.

Answer 8

it's not the roman xi?

Answer 9

no, its like xi in "Mexico"

Answer 10

http://www.1728.org/greek.htm

Answer 11

will it be pronounced as za-ee ?

Answer 12

If you are going to study the higher mathematics, you need to learn the greek letters.

Answer 13

I'm not sure about the pronounciation sorry =(. I'm not an english speaker.

Answer 14

so what you call it in greek?

Answer 15

I think there is a website that has the pronunciations.

Answer 16

ˈksi

Answer 17

\[\varepsilon\]

Answer 18

got it on forvo (in ancient Greek section)

Answer 19

I think the Zarkon's pronounciation it's right!