第十五周。

16多重积分.tex

@@ -470,6 +470,6 @@
     z = r \cos \theta
 \end{cases}\]
 这时
-\[\frac{\partial (x, y, z)}{\partial (r, \theta, z)} = r^2 \sin \theta\]
+\[\frac{\partial (x, y, z)}{\partial (r, \theta, \varphi)} = r^2 \sin \theta\]
 则
 \[\int \limits_\Omega f \dif \mu = \iiint \limits_{\tilde{\Omega}} f(r \sin \theta \cos \varphi, r \sin \theta \sin \varphi, r \cos \theta)\eqper\]