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## Main Question or Discussion Point

I was just wondering how you know if linear transformations injective?

- Thread starter mbud
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I was just wondering how you know if linear transformations injective?

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matt grime

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You work out its kernel. If it's a map from V to V then you can work out its determinant which tells you if the kernel is zero or not (but not what it is).

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thanks

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HallsofIvy

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