- #1
johann1301
- 217
- 1
If you take two arbitrary numbers from a set N - let's say N stands for the natural numbers - and add them together, the sum will always be an element of N.
In my language, there is a word for this, but i don't know what it is in english? If i translate it from norwegian, it would be something like;
"The set N is closed for addition"
Is "closed" the correct word?
In my language, there is a word for this, but i don't know what it is in english? If i translate it from norwegian, it would be something like;
"The set N is closed for addition"
Is "closed" the correct word?