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The most “Helpful” constant…?

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0
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2 is my most helpful constant.  
I just searched through my bachelor project for different constants:

2: 587  
1 : 530  
0 : 362  
pi : 334

I found it shocking that I have so many 2s but i realise that I have 104 occurances of 2pi...
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In what sense would a number be *helpful*?
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0, because you need it in order to form all the other numbers (in the von Neumann construction at least)
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We got a bunch of jokers in the comments. Technically correct is the best kind of correct.

The constants which get the most use are Euler's constant e and pi. If you don't know about Euler's identity, it's e^i*pi = -1. It's kind of a meme at this point just how MINDBLOWING Euler's identity is, but it is just one output of Euler's formula. That formula gives a nice way to describe any point on the unit circle in the complex plane. So beside e's many straightforward uses, it is a bridge between things that are not obviously connected.

Lots of problems have to do with circles or can be translated into a problem about circles. So pi crops up a lot as an algebraic necessity of discussing circular things, but I'd say e is more actively used as part of the process of getting to answers. Aliens may use a different circle constant but everyone knows about e. I think the best Voyager-like message to prove basic species intelligence is probably the binary representation of e.

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