This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Ndimensionale einheitskugel surfvol.svg de Oberflche und Volumen der nDimensionalen Einheitskugel gnuplot cvs reset set terminal svg fname 'Arial bold' fsize lw set border set key box set xrange set yrange set sample set tics nomirror set xtics set ytics set xlabel 'Dimensionen ' set ylabel 'Oberflche' tc lt set ylabel