Use matrix inversion to show that
the inverse transformation for a reflection about y=x is reflection about y=-x

Question

Use matrix inversion to show that 
the inverse transformation for a reflection about y=x is reflection about y=-x

anonymous · Answer

Plot 0,1 and take a reflection about your axis. Find out the new coordinates and construct a matrix

anonymous · Answer

the matrix formed is of the form[0 1,1 0] but what is it proving?

anonymous · Answer

It means that if you multiply and coordinate by this matrix you'll get it's reflection with the stated axis

anonymous · Answer

ok i got it i have another question 
All sequences in R infinity whose component are 0 from point on 
Is this a subspace in R infinity

anonymous · Answer

Um.. Explain a little more.. I didn't get it

anonymous · Answer

we have to find is the given sequence  a subspace in R infinity 
this is all given to me