Final answer:
Christoff Rudolff was a German mathematician notable for introducing the radical sign in algebra, particularly recognized for his book on arithmetic and algebra published in 1526.
Step-by-step explanation:
Christoff Rudolff was a German mathematician known for introducing the radical sign in algebra. His contributions are primarily in the field of mathematics, particularly in the simplification of the notation for square roots. Rudolff was a student of the more famous mathematician, Michael Stifel, and his intelligence in the field is reflected through his publication of the book “Künstliche Rechnung mit der Ziffer unnd mit den Zahlpfennigen” in 1526. This book illustrates his deep understanding of arithmetic and algebra during the time period. However, assessing his overall intelligence is subjective and not thoroughly documented.