Probably easy question but I don't know how to find invariant lines Could somebody help?The transformation S is a shear with Matrix M =
( -1 2 )
( -2 3 )
Points (x, y) are mapped under S to image (x', y') such that
(x', y') = M(x, y)
Show that all the lines of the form y = x + c, where c is a constant, are invariant lines of S.
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- Thread Starter
- 23-01-2010 02:51
Offline14ReputationRep:Wiki Support Team
- Wiki Support Team
- 23-01-2010 02:55
You know that M(x,y) = (x',y'), and are asked to show that the line y = x + c is invariant, i.e. that if y = x + c, then y' = x' + c. In practice, y = x + c means that we are working with the vector (x, x+c). Find the image of this under M, and it'll hopefully be of the form (x', x'+c).