The name pnictogens is also sometimes used for this group; it is not approved by IUPAC. The spelling pnicogen is also recorded. Both spellings derive from the Greekπνίγειν (pnigein), to choke or stifle, which is a property of nitrogen.
In 2D it is the symmetry group of a rhombus and of a rectangle, the four elements being the identity, the vertical reflection, the horizontal reflection, and a 180 degree rotation.
The three elements of order 2 in the Klein four-group are interchangeable: the automorphism group is the group of permutations of the three elements.
The Klein four-group is the discrete part {1, j, −1, −j} of the group of units of the split-complex number ring.
Group One now appeals the rulings by the district court, alleging that the court erred in declaring its patents invalid and in limiting its recovery for Hallmark’s misappropriation of its trade secrets to pre-publication head-start damages.
Dravo, supra, is not applicable to a case where, as here, defendants’ knowledge of plaintiffs’ trade secrets was acquired during a normal, albeit confidential[,] relationship, which has long since ceased, and the use of the alleged trade secrets occurred a substantial length of time after their voluntary disclosure by the issuance of patents to plaintiffs.
Group One correctly points out that these Missouri cases, as well as the other cases cited by the district court, all addressed trade secrets in the context of a former employee.