Direction vector: Revision history

28 September 2014

• curprev 06:1106:11, 28 September 2014 en>Dicklyon 4,177 bytes −2,862 rm contradiction and redundancy from lead; ce heading case

7 October 2013

• curprev 07:0707:07, 7 October 2013 en>Pbierre m 7,039 bytes +7,039 word parametrically is not appropriate here, since the representation does not depend on a parameter t

13 March 2012

• curprev 23:1523:15, 13 March 2012 en>Bruno321 2,390 bytes +2,390 →Direction vector for a line in R2: it was plain wrong. The vector (a,b) is a *normal* vector, which is precisely orthogonal to a *direction* vector.