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Jan 20, 2023 10:34 AM
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![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Ff1070a20-190a-44d4-b234-06804b34bd7d%2FUntitled.png?table=block&id=676dd59a-3a83-4bb7-b181-c9a3d832d966&t=676dd59a-3a83-4bb7-b181-c9a3d832d966&width=1883&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F7d6ff03f-cae7-4b14-819d-21ead8c02549%2FUntitled.png?table=block&id=d966f811-7343-493a-8ed2-cd078bd59706&t=d966f811-7343-493a-8ed2-cd078bd59706&width=1602&cache=v2)
由此例可以看出,矩阵等价与向量组等价没有关系!
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Feb322bd0-7440-48e2-8ba1-4eaa5bbf129b%2FUntitled.png?table=block&id=d17381ca-3e6b-406e-9b08-eccb47f485cd&t=d17381ca-3e6b-406e-9b08-eccb47f485cd&width=1920&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F9562ee81-54fe-4c51-a491-73c5df12bed9%2FUntitled.png?table=block&id=bcf1ac9a-1538-4b54-b769-441aaa6dbb3a&t=bcf1ac9a-1538-4b54-b769-441aaa6dbb3a&width=1686&cache=v2)
1. 矩阵等价
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F1c96d846-eb19-4541-b0c7-2ec12fc0e2f3%2FUntitled.png?table=block&id=2d71e377-f435-4c7d-a28c-c1c02b29451f&t=2d71e377-f435-4c7d-a28c-c1c02b29451f&width=1910&cache=v2)
行变换过程中矩阵的秩不发生改变
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Ff97767dc-de45-4be5-9b47-fbfafff37d1b%2FUntitled.png?table=block&id=bfc3dd95-330e-4f24-a366-f427c7cf2ea5&t=bfc3dd95-330e-4f24-a366-f427c7cf2ea5&width=1916&cache=v2)
A和B都可以经有限次初等变换变成同一个等价标准形
2. 矩阵的列向量组等价
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fb16f2e1d-bdd8-4aff-b749-85d66b275b99%2FUntitled.png?table=block&id=bb9fdd0c-3f73-4541-86ce-e281bb46b74e&t=bb9fdd0c-3f73-4541-86ce-e281bb46b74e&width=2976&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F6de97615-7924-4186-a256-4e0f02b59009%2FUntitled.png?table=block&id=89161fb5-6a88-4183-88d5-503bada5320e&t=89161fb5-6a88-4183-88d5-503bada5320e&width=1907&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F1531fab4-773c-4414-b67c-10a238703f9b%2FUntitled.png?table=block&id=47de6094-9162-4549-a124-0dbf64f8befe&t=47de6094-9162-4549-a124-0dbf64f8befe&width=1477&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fb8b0c92a-fa6b-483b-a717-2f4644a8e56f%2FUntitled.png?table=block&id=15a14eb1-5247-40bf-9b4f-4e1a123941b8&t=15a14eb1-5247-40bf-9b4f-4e1a123941b8&width=1439&cache=v2)
3. 矩阵列等价
- 矩阵列等价⇒ 矩阵列向量组等价
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fd1de0a6d-3e6e-4099-918b-f85e3d4c9c90%2FUntitled.png?table=block&id=92761979-a3d5-4ffe-b1d2-81a6c01080f2&t=92761979-a3d5-4ffe-b1d2-81a6c01080f2&width=1899&cache=v2)
A能经有限次初等列变换变成B,而初等变换矩阵可逆,故B也能经初等列变换变成A
- 矩阵列向量组等价⇒矩阵列等价
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fab18485c-592a-4bb4-889f-5a21f511d84a%2FUntitled.png?table=block&id=29ec06f1-6d26-42d3-9e1c-1ce0c63d4902&t=29ec06f1-6d26-42d3-9e1c-1ce0c63d4902&width=1825&cache=v2)
![notion image](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F16d8d3e8-7f47-4d85-a35a-45c1acff1ab2%2FUntitled.png?table=block&id=737ccce8-2603-47f9-942f-997d0208d5a4&t=737ccce8-2603-47f9-942f-997d0208d5a4&width=1893&cache=v2)
A和B都能经初等列变换为极大无关组,而B的极大无关组可以经初等列变换变为A的极大无关组,且这种变换可逆,故B可以经初等列变换变成A