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German mathematician Cantor approaches the infinity that was the realm of God. As time passed, more concepts of numbers emerged in the number of natural numbers, and he studied comparing infinity for all of these numbers. Using the one-to-one correspondence that Galileo mentioned, he substitutes fractions and negative numbers to compare endless infinite sets. Through a paper titled “Considerations of Set Theory,” he studies that the sizes of infinite sets are the same. The infinite number of points on a small leaf is the same as the infinite number of points in the universe. In the infinite world, parts are as abundant as the whole. This is an area that is still not intuitively understood. How can the points on a small leaf be the same as the points on the entire Earth? Even mathematicians at the time did not understand, and Cantor died unfortunate despite creating a great theory. #College Entrance Exam #How to Study Math Well