from which one easily concludes that <math>c_1(TM) = c_1(K_M) = 0</math>.
from which one easily concludes that <math>c_1(TM) = c_1(K_M) = 0</math>.
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==Calabi Conjecture==
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The first Chern class of a Kaehler manifold is homologous to the Ricci curvature. For this reason, Calabi conjectured that when <math>c_1 = 0</math>, there existed a metric on the manifold whose Ricci form identically vanished. This, the Calabi-Conjecture, was eventually proven by Shing-Tung Yau.