Suppose that

M={(a b ;a,b,c belong to R

-b c)

and N={(x 0 ;x,y belong to R

y 0)

are subspaces of M2R. Show that (M:R) + (N:R) = ((M'intersect'N):R) + ((M+N):R)

Cheers, Shaun

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- Nov 27th 2006, 06:27 AMShaun Gillhelp needed with a proof
Suppose that

M={(a b ;a,b,c belong to R

-b c)

and N={(x 0 ;x,y belong to R

y 0)

are subspaces of M2R. Show that (M:R) + (N:R) = ((M'intersect'N):R) + ((M+N):R)

Cheers, Shaun - Nov 27th 2006, 09:47 AMThePerfectHacker
- Nov 27th 2006, 10:00 AMPlato
I think that these are the same problem.

http://www.mathhelpforum.com/math-he...ons-basis.html