On Tue, 2011-08-09 at 06:47 +0800, Wu Fengguang wrote: > origin is where the control line crosses the X axis (in both the > global/bdi setpoint cases). Ah, that's normally called zero, root or or x-intercept: http://en.wikipedia.org/wiki/X-intercept -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href