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Can anyone give an example of a simple application of category theory? Not a very mathematical one, just one that shows how it can be used. Something for example that can be solved by just getting the limit or something (preferably in the category of sets or finite sets). I searched but could not find a published one. I understand that to apply category theory on something you need to be very specialized on that area. Thank you

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    $\begingroup$ you might look at these questions: math.stackexchange.com/questions/312605/… and mathoverflow.net/questions/19325/… (heavier maths there) $\endgroup$ – mebassett Jan 25 '14 at 12:49
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    $\begingroup$ This question has been asked a lot of times on math.SE. Vote to close. $\endgroup$ – Martin Brandenburg Jan 25 '14 at 12:53
  • $\begingroup$ It has been asked a lot and got few actual answers other than those involving topological spaces and vectors. If the OPs could understand topological spaces then they would not ask this question $\endgroup$ – user123776 Jan 25 '14 at 12:54
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    $\begingroup$ Then please narrow your question accordingly. $\endgroup$ – Martin Brandenburg Jan 25 '14 at 12:55
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Have a look through this book about category theory for scientists.

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    $\begingroup$ Nice. Thank you very much $\endgroup$ – user123776 Jan 25 '14 at 12:56

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