The notion of prime number is fundamental in number theory. The first part of this chapter is devoted to proving that every integer can be written as a product of primes in an essentially unique way.
After that, we shall prove an analogous theorem in the ring of polynomials over a field.
On a more abstract plane, the general idea of unique factorization is treated for principal ideal domains.
Finally, returning from the abstract to the concrete, the general theory is applied to two special rings that will be important later in the book.
KeywordsPrime Number Integral Domain Unique Factorization Great Common Divisor Irreducible Polynomial
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