Sleeping Beauty (1959 film) first Disney feature-film that did not have the same background animation material, but instead with new background animation material. "Sleeping Beauty" was the first animated film to be photographed in the Super Technirama 70 widescreen process, as well as the second full-length animated feature film to be filmed in anamorphic widescreen, following Disney's own "Lady and the Tramp" four years earlier. The film was presented in Super Technirama 70 and 6-channel stereophonic sound in first-run engagements. After many childless years, King Stefan and Queen Leah happily welcome the birth of their daughter, the Princess Aurora. They proclaim a holiday for
Sleeping Beauty problem with imperfect recall was provided first by Michele Piccione and Ariel Rubinstein in their paper: "On the Interpretation of Decision Problems with Imperfect Recall" where the "paradox of the absent minded driver" was first introduced and the Sleeping Beauty problem discussed as Example 5. The name "Sleeping Beauty" was given to the problem by Robert Stalnaker and was first used in extensive discussion in the Usenet newsgroup "rec.puzzles" in 1999. Sleeping Beauty volunteers to undergo the following experiment and is told all of the following details: On Sunday she will be put to sleep. Once or twice, during the experiment,