Summary

Source code

Created with gnuplot using the following input file:

set terminal svg font "Bitstream Vera Sans,18" size 600,500
set output "Golden_function.svg"

set xrange [-6:6]
set yrange [0:6.5]
set xzeroaxis linetype -1
set yzeroaxis linetype -1
set xtics axis nomirror offset 0,0.3
set ytics axis nomirror offset -0.8
set key off
set grid
set border 0

set samples 400

plot (x+sqrt(x**2+4))/2 with line linetype rgbcolor "red" linewidth 2

The output SVG was filtered with the following command to change the hyphens to proper minus signs:

sed -i 's/<text>-/<text>\xE2\x88\x92/g' Golden_function.svg

Licensing

This work has been released into the public domain by its author, Qef. This applies worldwide. In some countries this may not be legally possible; if so: Qef grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.