On a larger scale, this sounds like the premise behind Asimov's Foundation books. In essence, a visionary mathematician predicts a 30,000 year dark age descend

On a larger scale, this sounds like the premise behind Asimov's Foundation books. In essence, a visionary mathematician predicts a 30,000 year dark age descending on the Galactic Empire. In response, he creates the Foundation, a remote galactic repository of human knowledge to assist in the reboot.