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recently, I have found so called Batman graph and equation, which basically plots Batman sign.

I have even found Python code that plots this implicit equation.

Code can be found here:

.

And the equation is given here:

http://i.imgur.com/CNy9J.jpg

If you look closelx, you'll see that there are a lot of signum functions and for many numbers that belongs to the graph, there is square root of negative number which is not defined in real number space.

This is a warning sign that equation is not good.

But somehow, if you use this equation it still plots OK.

I cannot explained this. Can you help me understand this?

Python plot just discard nonsence and doesn't plot (naturally) complex numbers.

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# Interesting plot of an implicit equation with square root of signum functions

Can you offer guidance or do you also need help?

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