[hcayless]

Title needs correction: that’s a Greek letter mu, μ, not a u.

Addendum: though it is clearly a u in the URL. Someone may be confused...

[wccrawford]

It's pretty common to use a u instead of mu in situations that need just plain ascii. I don't think anyone's confused. uTorrent comes to mind, too.

[pcthrowaway]

what do people use for Ypsilon (υ) then?

[anecdotal1]

I've never seen a software project choose a Ypsilon in their name before. Have any examples?

μ provides a good contextual clue about the project. What would the ε character tell me?

[pcthrowaway]

> What would the ε character tell me?

That's epsilon, not ypsilon (it just occurred to me that it's more common to see it called "upsilon" in English, though I don't know why based on how the letter is pronounced - "eee-psilon")

[anecdotal1]

Oooh! Thank you for pointing that out

[jraph]

> What would the ε character tell me?

Smaller than μ. Still strictly positive but as small as you want. Nothing possibly smaller.

[yboris]

Except maybe the surreal numbers ? https://en.wikipedia.org/wiki/Surreal_number those are smaller than "as small as you want" :P

[jraph]

Damn! Let's be real though.