https://en.wikipedia.org/wiki/Friendly_artificial_intelligen...
And here is a more detailed explanation:
https://intelligence.org/files/CEV.pdf
If I remember correctly the author unsuccessfully tried to get that purged from the Internet
Is this some thing about an obelisk?
I do recall there was some recantation or otherwise distancing from CEV not long after he posted it, but frankly it was long ago enough that my memories might be getting mixed
What was the other one?
TL;DR train a seed AI to guess what humans would want if they were "better" and do that.
https://en.wikipedia.org/wiki/Friendly_artificial_intelligen...
And here is a more detailed explanation:
https://intelligence.org/files/CEV.pdf