

Teori Ring
Presentation
•
Mathematics
•
9th Grade
•
Hard
Asep Nursangaji
FREE Resource
4 Slides • 0 Questions
1
by Asep Nursangaji
2
Definisi. Sebuah Ring R adalah sebuah himpunan dengan operasi penjumlahan (+) dan perkalian (.), sedemikian sehingga setiap a, b, c dala R berlaku:
1. (R, +) sebuah grup abelian
2. a.(b.c) = (a.b).c
3. a.(b + C) = a.b + a.c dan (b + c).a = b.a + ca.
Jika a,b dalam R berlaku a.b = b.a maka (R, +, .) disebut ringa komutatif.
Sebuah satuan atau identitas dalam ring R adalah unsur tak nol yang merupakan identitas perkalian.
3
4
Teorema. Aturan perkalian.
1. a.0 = 0.a
2. (-a).b = a(-b) = -(ab)
3. (-a)(-b) = ab
4. a(b - c) = ab - ac dan (b - c).a = ba - ca
by Asep Nursangaji
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