Lost ekf development book?

[hexad]

Sorry that I post this issue here, but after searching everywhere, I think this is the most appropriate place to ask. I had a file in my pc with this title: [email protected] Unfortunately, it is gone for good now.

While I am not 100% sure of its contents, I think it was a work-in-progress book about Kalman filter developement, that was being hosted here on Github.

I cannot find the original repo though (maybe this is the repo i was searching for), and since this is the closest repo (if not the one), I have to ask here.

Is this a file that is being recognized by the community here? Perhaps this is a file of this repo? Does anyone recognize the commit number?

Thanks again!