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Perception of linear algebra 2
2022-04-23 17:08:00 【code bean】
Recently in to see liuyubobobo Of Linear algebra , It feels good , Some insights are recorded ~~~
A little insight :
The Union Law of matrix, second ! The associative law of matrices is very important
This figure , A two-step , First along x The axis turns , Reengaging y The axis turns .
because The multiplication of matrices satisfies the law of association , So we can put Tx*Ty To calculate , Get a new transformation factor .
Then the new transformation factor can complete the purpose at one time !!!
But there's a problem , The multiplication of matrices does not satisfy the commutative law , But we found that , First along x The axis turns , Reengaging y Axis flip and First along y The axis turns , Then flip along the lower axis , It's the same .
That's because Tx*Ty Just and Ty*Tx equal .
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