Summary

DescriptionTravelling wave for Fisher equation.svg	Plot of the function ${\displaystyle f(x)=(1+{\textrm {e}}^{-x/{\sqrt {6}}})^{-2}.}$ This is a travelling wave solution for Fisher's equation.
Date	10 April 2007, 13:21 (UTC)
Source	Own work, created using Matlab
Author	Jitse Niesen
Permission (Reusing this file)	PD (see below)

Matlab source

clf;
xs = linspace(-20,20);
vstar = (1+exp(-xs/sqrt(6))).^(-2);
plot(-xs,vstar,'r', 'Linewidth', 3);
set(gca, 'FontSize', 15);
box off;
xlabel('x');
ylabel('u');
hold on;
plot([1 5], [.5 .5], 'k', 'Linewidth', 1.5);
plot([5 4], [.5 .52], 'k', 'Linewidth', 1.5);
plot([5 4], [.5 .48], 'k', 'Linewidth', 1.5);
hold off;
plot2svg('fishertw.svg');

Licensing

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.