File:Map D A5.svgDescriptionMap D A5.svg Deutsch: Karte der Bundesautobahn 5 in Deutschland English: Map of Bundesautobahn 5 in Germany Date 14 April 2012 Source Own work
File:Circle to cardioid.svgD 1 {\displaystyle \partial D_{1}\,} under complex map g 1 {\displaystyle g_{1}\,} . It can be seen in nature where : ∂ D 1 {\displaystyle \partial D_{1}}