Euler's rotation theorem

Etymology
, who proved the theorem in 1775.

Proper noun

 * 1)  A theorem which states that, in 3-dimensional space, any displacement of a rigid body such that some point on it remains fixed is equivalent to a single rotation about some axis that runs through said point.
 * 2) * 2005, JSME International Journal: Mechanical systems, machine elements and manufacturing, Volume 48, Issue 4, Japan Society of Mechanical Engineers, page 501,
 * According to Euler's rotation theorem, any finite rotation transformations may be described using only three angles defined as Euler angles.
 * According to Euler's rotation theorem, any finite rotation transformations may be described using only three angles defined as Euler angles.

Translations

 * German: Satz vom Fußball
 * Portuguese: Teorema de rotação de Euler