taylor

diff --git a/solid_state_physics/tutorial/1_02s.tex b/solid_state_physics/tutorial/1_02s.tex
index e782f74..2827bb7 100644 (file)
--- 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-