Rotation Vector : In continuum mechanics, it is the vector ? n, where ? is the rotation angle and n is the unit vector along the axis of rotation. It corresponds to the rotation tensor, P = (1 - cos ? ) n n + cos? I + sin? I x n
Peter Bormann, Keiiti Aki, William H. K. Lee, and Johannes Schweitzer (Compilers and Amenders), Glossary of Terms Interest to Earthquake and Engineering Seismologists (Version 1), Publication records from external use of GFZ scientific infrastructure, Germany 2011. http://gfzpublic.gfz-potsdam.de/pubman/item/escido c:56137:3/component/escidoc:56143/Glossary_rev1.pd f, (ND/ Erthq - Amer) {980}