The Prime Radiant

Item from Foundation by Isaac Asimov

Handheld device containing the complete equations of the Seldon Plan — only Second Foundationers can read or modify it. A glowing mathematical display that holds the galaxy's future in symbolic notation.

Also known as: the Radiant, Seldon's Prime Radiant

What They Know

• Contains the complete mathematical equations of the Seldon Plan in symbolic notation
• Only responds to trained mentalic input — unusable by anyone outside the Second Foundation
• The First Speaker authorizes changes to core equations; modifications require years of recalculation
• The device is small enough to hold in one hand despite containing a galaxy's worth of predictions
• After the Mule's disruption, the Second Foundation used the Prime Radiant to recalculate the entire plan

Connections

• belongs_to — second_foundation_hq
• contains — psychohistory_science
• used_by — second_foundation_hq

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