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For a complete list, see Fifty pence (British decimal coin). Prior to 1997, the two pound coin was minted in commemorative issues only – in 1986, 1989, 1994, 1995 and 1996. Commemorative £2 coins have been regularly issued since 1999, alongside the standard-issue bi-metallic coins which were introduced in 1997.
A complex vector X ∈ C k is said to be normal if both its real and imaginary components jointly possess a 2k-dimensional multivariate normal distribution. The variance-covariance structure of X is described by two matrices: the variance matrix Γ, and the relation matrix C. Matrix normal distribution describes the case of normally distributed ...
One hypothesis is that the "Brown Bess" was named after Elizabeth I of England, but this lacks support.Jonathan Ferguson, Keeper of Firearms and Artillery at the Royal Armouries, traces the name to at least the 1760s, and his research suggests the name was adopted from slang for a mistress, prostitute, or lowly woman who also appear in period sources referred to as "Brown Bess".