diff --git a/A b/A
index fe0f5f3396eb3e99cec40a392ec0b6a245da9b8b..ad6f8746b834fbf7444fadfb8e11bfec4ac221b1 160000
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-Subproject commit fe0f5f3396eb3e99cec40a392ec0b6a245da9b8b
+Subproject commit ad6f8746b834fbf7444fadfb8e11bfec4ac221b1
diff --git a/index.ipynb b/index.ipynb
index 00677009257dd56be6829d06a87498be56d0f965..e19ac8c265530acb4739e48b02161b84cb464802 100644
--- a/index.ipynb
+++ b/index.ipynb
@@ -48,6 +48,7 @@
     "    * [Reale Abtastung](A/GDET3%20Reale%20Abtastung.ipynb)\n",
     "    * [Demo Diskretes Faltungsintegral](A/GDET3%20Diskrete%20Faltung%20GUI.ipynb)\n",
     "    * [Diskrete Fourier-Transformation](A/GDET3%20Diskrete%20Fourier-Transformation.ipynb)\n",
+    "    * [Demo Diskrete Fourier-Transformation](A/GDET3%20Diskrete%20Fourier-Transformation%20GUI.ipynb)\n",
     "    * [Demo $z$-Transformation](A/GDET3%20z-Transformation%20GUI.ipynb)\n",
     "5. Systemtheorie der Tiefpass- und Bandpasssysteme\n",
     "    * [Äquivalenter Tiefpass](A/GDET3%20Äquivalenter%20Tiefpass.ipynb)\n",