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Mouth
why. {}

arima kousei
i practiced this quote so much that i memorized it

Marie Lu
i LOVE this series TT

Anonymous
Creepy

unknown
This quote hits so hard.

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michaelyu's คำคม

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Sheldon Axler - Determinants
Determinants are difficult, nonintuitive, and often defined without motivation. To prove the theorem about existence of eigenvalues on complex vector spaces, most books must define determinants, prove that a linear map is not invertible if and only if its determinant equals 0, and then define the characteristic polynomial. This tortuous path gives students little feeling for why eigenvalues must exist.