X-Git-Url: https://hackdaworld.org/gitweb/?p=lectures%2Flatex.git;a=blobdiff_plain;f=solid_state_physics%2Ftutorial%2F1_02s.tex;h=2827bb7d27dc620326c994cff48099e3ae72c6e4;hp=e782f746964382446eed2d49ff7a762e4c0ef3bb;hb=32f786010b14f1197f69bddc12e6e35bff697fba;hpb=b0536278b959f12a42c5856b21cb5d0502ae74d3

diff --git a/solid_state_physics/tutorial/1_02s.tex b/solid_state_physics/tutorial/1_02s.tex
index e782f74..2827bb7 100644
--- a/solid_state_physics/tutorial/1_02s.tex
+++ b/solid_state_physics/tutorial/1_02s.tex
@@ -80,7 +80,7 @@
 	\item $\sigma_{\perp} = \alpha \rho_0$, $\alpha \ll 1$\\
 	      $\sqrt{\rho_0^2+\sigma_{\perp}^2}=
 	       \sqrt{\rho_0^2+\alpha^2\rho_0^2}=
-	       \rho_0\sqrt{1+\alpha^2}=
+	       \rho_0\sqrt{1+\alpha^2}\stackrel{Taylor}{=}
 	       \rho_0(1+\frac{\alpha^2}{2}-\frac{\alpha^4}{8}+\ldots)$\\
 	      $\Rightarrow \Phi-\Phi_0=
 	       \frac{D}{2}\left[\rho_0^2\left(2+\alpha^2-