Monday, 19 August 2013

conversion between multiplicative and additive group notation

conversion between multiplicative and additive group notation

I'm quite new to Groups and I'm using them for cryptology purpose.
Currently, I'm learning about Elliptic Curve Cryptography and facing a
notation problem.
Since Elliptic Curves are abelian the group operation is normally donated
with a +. And for $P\in E:$ $P+P = 2P$. In cryptography the multiplicative
notation is used. Am I right, when I assume that $P^2$ in multiplicative
notation equals $2*P$ in additive notation?
How can I convert $P^\frac{1}{a+b}$ into additive notation?

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