Paper size a number of different sizes were defined for large sheets of paper, and paper sizes were defined by the sheet name and the number of times it had been folded. Thus a full sheet of "royal" paper was 25 × 20 inches, and "royal octavo" was this size folded three times, so as to make eight sheets, and was thus 10 × inches. Imperial sizes were used in the United Kingdom and its territories. These sizes are no longer commonly used since the UK switched to ISO sizes. Many of these sizes were only used for making books (see bookbinding),
Folded normal distribution and 0, which corresponds to the minimum log-likelihood. Folded normal distribution + \frac{1}{\sigma\sqrt{2\pi}} \, e^{ -\frac{(x+\mu)^2}{2\sigma^2} }</math> The folded normal distribution is a probability distribution related to the normal distribution. Given a normally distributed random variable "X" with mean "μ" and variance "σ", the random variable "Y" = |"X"| has a folded normal distribution. Such a case may be encountered if only the magnitude of some variable is recorded, but not its sign. The distribution is called "folded" because probability mass to the left of the "x" = 0 is folded over by taking the absolute value. In the physics