3 Polynomial Rings

نویسنده

  • MinJi Kim
چکیده

A ring is a set R with two binary operations usually called addition, denoted as +, and multiplication, denoted as ·, such that (R, +) satisfies the five axioms of closure, associativity, commutativity, identity element (called zero, 0), and inverse element; and (R, ·) satisfies the three axioms of closure, associativity, and identity element (called one, 1). Furthermore, multiplication (·) distributes over addition (+), i.e. a · (b + c) = a · b + a · c. Rings are commutative over addition (a + b = b + a), but need not be commutative over multiplication (a ·b = b ·a). Rings that satisfy commutativity for multiplication are called commutative rings. In this lecture, we will only consider commutative rings. A field F is a ring where every non-zero element has a multiplicative inverse.

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تاریخ انتشار 2008