Aurora Gallardo, The Extension of the Natural-Number Domain to the Integers in the Transition from Arithmetic to Algebra, Educational Studies in Mathematics, Vol. 49, No. 2 (2002), pp. 171-192 ...

, Melvyn B. Nathanson, Sets of Natural Numbers with no Minimal Asymptotic Bases, Proceedings of the American Mathematical Society, Vol. 70, No. 2 (Jul., 1978), pp ...

Prime numbers are a central topic of study in math. Despite being an object of fascination for millennia, there are still a lot of unsolved problems involving primes.

In his visualization, you can highlight any natural number (the normal numbers we count) on the number line and see how it relates to its fellow numbers.

This article was originally published with the title “A Natural Log: Our Innate Sense of Numbers is Logarithmic, Not Linear” in SA Mind Vol. 19 No. 4 (August 2008), p. 13 ...

An animated journey into the world of rational numbers! A fraction thief disrupts a number town, leading to a fun exploration of fractions, natural numbers, and mathematical concepts.