Is it possible to memorize some data points in an Alchemy library ?
In a first time I call a function of the Alchemy library to store points; and then later I call another function to make some computations on these points.
Yes, you will need to pass back a pointer to the AS side. You can pass it as a UINT, so when you com back to do some computations you can access the memory you have stored. If you look at the crypto examples you can see that being done there.
Remember to eventually release the memory when you are done, in some function.