Coat of arms of Cyprus Akrotiri and Dhekelia do not have their own unique coat of arms. The coat of arms of the United Kingdom is used instead. 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
Ore extension which means that "δ" is a homomorphism of abelian groups satisfying Then the Ore extension "R"["x";"σ","δ"], also called a skew polynomial ring, is the noncommutative ring obtained by giving the ring of polynomials "R"["x"] a new multiplication, subject to the identity If "δ" = 0 (i.e., is the zero map) then the Ore extension is denoted "R"["x"; "σ"]. If "σ" = 1 (i.e., the identity map) then the Ore extension is denoted "R"["x","δ"] and is called a differential polynomial ring. The Weyl algebras are Ore extensions, with "R" any commutative polynomial ring, "σ" the identity ring endomorphism, and "δ" the