A picture of R3, cut by three planes. Image by Alksentrs and licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Figure source: http://en.wikipedia.org/wiki/File:Linear_subspaces_with_shading.svg.
A picture of R3, cut by three planes. Image by Alksentrs and licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Figure source: http://en.wikipedia.org/wiki/File:Linear_subspaces_with_shading.svg.
