Coat of arms of Cyprus Coat of arms of Cyprus The coat of arms of the Republic of Cyprus depicts a dove carrying an olive branch (a well-known symbol of peace) over “1960”, the year of Cypriot independence from British rule. The background is a copper-yellow colour; this symbolises the large deposits of copper ore on Cyprus (chiefly in the form of chalcopyrite, which is yellow in colour). The arms is not violating the rule of tincture, since the dove is not argent (silver) but blazoned as of the colour proper, i.e. it has the colour it would have in nature, in this case white.
Ore algebra commutation in the definition makes Ore algebras have a non-commutative generalization theory of Gröbner basis for their left ideals. Ore algebra In computer algebra, an Ore algebra is a special kind of iterated Ore extension that can be used to represent linear functional operators, including linear differential and/or recurrence operators. The concept is named after Øystein Ore. Let formula_1 be a (commutative) field and formula_2 be a commutative polynomial ring (with formula_3 when formula_4). The iterated skew polynomial ring formula_5 is called an Ore algebra when the formula_6 and formula_7 commute for formula_8, and satisfy formula_9, formula_10 for formula_11. Ore