Cube root polar angle by three in order to define a cube root. With this definition, the principal cube root of a negative number is a complex number, and for instance will not be −2, but rather . This difficulty can also be solved by considering the cube root as a multivalued function: if we write the original complex number "x" in three equivalent forms, namely The principal complex cube roots of these three forms are then respectively Unless , these three complex numbers are distinct, even though the three representations of "x" were equivalent. For example, may then be calculated to
The Cube (restaurant) The Cube (restaurant) The Cube is a pop-up restaurant created by Electrolux. Since 2011, two versions of the restaurant have been located in different cities in Europe, where a number of guest celebrity chefs have brought teams and dishes from their own restaurants to cook in the spaces. The Cube was designed by Park Associati design studio in Milan, and the construction covers a space of 140 m. It has an outside balcony allowing for a 360-degree field of vision. The exterior shell is made of aluminium and has hexagonal shapes cut into the shell by laser in order to