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1
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1answer
94 views

Algorithm: Cracking the Safe

A safe is protected by a four-digit $(0-9)$ combination. The safe only considers the last four digits entered when deciding whether an input matches the passcode. For instance, if I enter the stream ...
0
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1answer
38 views

algoritm to convert a monoid into an automaton [closed]

In literature, is there an algoritm to convert a monoid into an atomaton? I am looking for references/applications.
8
votes
1answer
128 views

Group isomorphism to graph ismorphism

In reading some blogs about computational complexity (for example here)I assimilated the notion that deciding if two groups are isomorphic is easier than testing two graphs for isomorphism. For ...
2
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1answer
82 views

n-Cube as a Cayley Graph

I'm taking a class on graph theory that uses "Graph Theory (Graduate Texts in Mathematics)" by Bondy and Murty. One of the questions is about Cayley graphs and the n-cube, and I don't understand how ...
7
votes
3answers
319 views

Bridge theorems for group theory and formal languages

Is there some natural or notable way to relate or link math groups and CS formal languages or some other core CS concept e.g. Turing machines? I am looking for references/applications. However ...
23
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6answers
3k views

What use are groups, monoids, and rings in database computations?

Why would a company like Twitter be interest in algebraic concepts like groups, monoids and rings. https://github.com/twitter/algebird All I could find is: Implementations of Monoids for ...
3
votes
1answer
203 views

Visualized definition of cohomology

I cannot imagine how cohomology is related to graph theory, actually I read solid definition from wiki, and to be honest, I cannot understand it. e.g I know what is homotopy (in simple term), group ...