Operators can go anywhere on the Cartesian plane (x, y and z axes) because the wheels can spin at different speeds.
FORBES: Airtrax topples the tyranny of steering.
Operators can go anywhere on the Cartesian plane (x, y and z axes) because the wheels can spin at different speeds (see graphic).
People who lived in the pre-Cartesian dimension, before we were told that nature was there to be plundered, were basically no different from us.
BBC: VIEWPOINT
Such distinctions do matter, especially to the Cartesian Mr Obama.
ECONOMIST: Lexington
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