# S(S(f)) = S(f) for reloids

\begin{question} $S(S(f)) = S(f)$ for every endo-\href[reloid]{http://www.wikinfo.org/index.php/Reloid} $f$? \end{question}

See \href [Algebraic General Topology]{http://www.mathematics21.org/algebraic-general-topology.html}, especially \href [Connectedness of funcoids and reloids]{http://www.mathematics21.org/binaries/connectedness.pdf} for definitions of used concepts.

% Our special features: % Links to wikipedia: \Def {mathematics} or \Def[coloring]{Graph_coloring} % General web links: \href [The On-Line Encyclopedia of Integer Sequences]{http://www.research.att.com/~njas/sequences/}

## Bibliography

*Victor Porton. \href [Algebraic General Topology]{http://www.mathematics21.org/algebraic-general-topology.html} % (Put an empty line between individual entries)

* indicates original appearance(s) of problem.

## Mistake fixed

There were a big mistake in http://www.mathematics21.org/binaries/connectedness.pdf where are defined some of the concepts used by this open problem. I have rewritten the article, not it should be OK.

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Victor Porton - http://www.mathematics21.org