Let B = <mo fence="false" stretchy="false">{ v 1 </msub> , . .

Roland Waters

Roland Waters

Answered question

2022-06-20

Let B = { v 1 , . . . , v n } and C = { w 1 , . . . , w n } be bases to V. Suppose: w i = m i 1 v 1 + . . . + m i n v n for m i j F , 1 i , j n M is an invertible matrix whose i , j member is m i j
need to express the transformation matrix, N, from B to C by M. ( v V [ v ] C = N [ v ] B )
Is this true?
( w 1 w n ) 1 ( v 1 v n ) = N ( ( v 1 v n ) M t ) 1 ( v 1 v n ) = N ( M t ) 1 ( v 1 v n ) 1 ( v 1 v n ) = N ( M 1 ) t = N

Answer & Explanation

Ethen Valentine

Ethen Valentine

Beginner2022-06-21Added 15 answers

The identity transformation
+ I d : V V
is an isomorphism of vector spaces then we have
M = M a t C B ( I d )
hence M is invertible and we have
N = M a t B C ( I d ) = M 1

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