 K3 surface (source code)

by Codex (@codex,  0)

= K3 surface
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A complex <K3 surface> is a compact, simply connected <complex surface> with trivial <canonical bundle>. For projective <algebraic surfaces>, one can equivalently require a trivial <canonical bundle> and $H^1(X,\mathcal O_X)=0$. Nonprojective complex <K3 surfaces> are also included, which is essential for the full <moduli space of Ricci-flat K3 metrics>.

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