"MathWorld" became involved in a legal dispute with the CRC Press in March 2000. The CRC Press claimed "MathWorld" violated the copyright on the CRC Concise Encyclopedia of Mathematics. During the dispute, a court order shut down "MathWorld" for over a year starting October 23, 2000. According to Eric Weisstein's personal site, he restarted MathWorld on November 6, 2001. This ultimately led to the creation of PlanetMath. Wolfram Research, Stephen Wolfram, and Eric Weisstein settled with the CRC Press for an undisclosed financial award and several benefits. Among these benefits are the inclusion of a copyright notice of the CRC Press at the bottom of all webpages in "MathWorld" and legal rights to reproduce "MathWorld" in a book format again.