# What is the mathematical symbol for integers?

by l46kok
Tags: integers, mathematical, symbol
 P: 296 The mathematical symbol for real numbers is R, with another vertical line coming down on the left side of the R. What is the mathematical symbol for integers? can anyone draw it?
 P: 492 $$\mathbb{Z}$$ there's also $$\mathbb{Q}$$ for rational numbers and plenty more I think wikipedia has a huge list of math symbols (Not, greater/less than, is a subset, for every, there exists a, etc....)
 PF Gold P: 1,059 You must have noticed that 'N' is frequently used, such as: 1+2++++n=n(n+1)/2, and the 'nth prime is commonly denoted as' $$p_n$$. And the $$\sum_{i=1,N}x_i$$ Also: "If N is an odd perfect number....""Expressing N as the difference of two integral squares." Examples are very, very numerous, but don't explain why N is the first letter of Number, and I of Integer. (If I might hazard a guess, we have to remember that small i alone represents the square root of -1. This means we could not easily go from big I to small i and really mean the same thing, but we can do it with N.)
 Math Emeritus Sci Advisor Thanks PF Gold P: 39,503 What is the mathematical symbol for integers? 'N' is commonly used for what? In the examples you give 'n' is commonly used to represent a single interger or, more commonly, natural number. 'N' is commonly used to represent the set of all "natural numbers": positive integers.
 Sci Advisor HW Helper P: 9,470 do others believe Z stands for "zahlen"?
 Sci Advisor HW Helper P: 9,470 do others believe Z stands for "zahlen"?