Exp(x) is CKKS without ChebyshevFunction

FHE Questions
1

Since ChebyshevFunction requires relatively large parameters, is there a way in CKKS to evaluate exp(x) without using ChebyshevFunction?

2

Hi,
I suggest reading this paper.
You can approximate the exponential function with a truncated Taylor series. Depending on the application, you can use a reduction that allows you to achieve faster convergence at the expense of slightly greater depth. This is explained in more detail in the paper.

3

Thanks for your reply! This is very helpful.