Britney Gallivan Britney Gallivan Britney Crystal Gallivan (born 1985) of Pomona, California, is best known for determining the maximum number of times that paper or other materials can be folded in half. In January 2002, while a junior in high school, Gallivan demonstrated that a single piece of toilet paper 4000 ft (1200 m) in length can be folded in half twelve times. This was contrary to the popular conception that the maximum number of times any piece of paper could be folded in half was seven. She calculated that, instead of folding in half every other direction, the least volume of
Folded-t and half-t distributions allowing for finite degrees-of-freedom (the normal analogues constitute the limiting cases of infinite degrees-of-freedom). Since the Cauchy distribution constitutes the special case of a Student-"t" distribution with one degree of freedom, the families of folded and half-"t" distributions include the folded Cauchy and half-Cauchy distributions for formula_5. If formula_3, the folded-"t" distribution reduces to the special case of the half-"t" distribution. Its probability density function then simplifies to The half-"t" distribution's first two moments (expectation and variance) are given by: and Folded-t and half-t distributions In statistics, the folded-"t" and half-"t" distributions are derived from Student's "t"-distribution by taking the