You will find an interesting and accessible history of the notion of infinity at http://www.mathacademy.com/pr/minitext/infinity/ In the course of discussing the history, the article naturally discusses some of the varying concepts of infinity and who proposed them; and at the end of the article there is a "Link Library" button that will bring you to other sites about infinity.
Pythagoras
27
first five postulate
It is infinite. Infinite since numbers are infinite.
yes numbers are infinite.......... ^_^
The infinite set of numbers which are multiples of three. The infinite set of numbers which are multiples of three. The infinite set of numbers which are multiples of three. The infinite set of numbers which are multiples of three.
The numbers that are divisible by 102 are infinite. The first four are: 102, 204, 306, 408.
The numbers that are divisible by 33 are infinite. The first four are: 33, 66, 99, 132 . . .
The numbers that are divisible by 7,677 are infinite. The first four are: 7677, 15354, 23031, 30708 . . .
The numbers that are divisible by 501 are infinite. The first four are: 501, 1002, 1503, 2004.
The numbers that are divisible by 824 are infinite. The first four are: 824, 1648, 2472, 3296.
The numbers that are divisible by 972 are infinite. The first four are: 972, 1944, 2916, 3888.