(\alpha)
(\beta)
flipped by
a
a
a
qwq
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$H=-\sum_{i=1}^N (\sigma_{i}^x \sigma_{i+1}^x+g \sigma_{i}^z)$
The Quadratic Formula
Cauchy's Integral Formula
Angle Sum Formula for Cosines
Gauss' Divergence Theorem
Curl of a Vector Field
Standard Deviation
Definition of Christoffel Symbols
上帝说，要有
于是就有了光。