## Explain the dual comma symbols

William Lynch
Posts: 45
Joined: Mon Sep 21, 2015 9:27 pm

### Explain the dual comma symbols

Hey, I get alot of the symbols but some I don't understand because it's like there are signs which represent two commas. Like 7 limit needs both why is this? I need to know for the book I'm writing.

Dave Keenan
Posts: 268
Joined: Tue Sep 01, 2015 2:59 pm
Location: Brisbane, Queensland, Australia
Contact:

### Re: Explain the dual comma symbols

William Lynch wrote:Hey, I get alot of the symbols but some I don't understand because it's like there are signs which represent two commas. Like 7 limit needs both why is this? I need to know for the book I'm writing.
You don't _need_ both, but if it's convenient, you can use a single 5:7-kleisma symbol instead of the combination of 7-comma minus 5-comma.
=
nai = pao tai

It makes it obvious what the direction of the resulting alteration is, and that it's small (about 5 cents).

cam.taylor
Posts: 51
Joined: Thu Sep 03, 2015 11:55 am

### Re: Explain the dual comma symbols

[thumbs up]

I find myself using more and more these days, not only for prime 19, but for the difference between and , as Dave said above. It's only a schisma (~2c) apart from 225:224 (like the difference between 14/9 and 25/16), too, so I use it for that most of the time too. Handy.

Dave Keenan
Posts: 268
Joined: Tue Sep 01, 2015 2:59 pm
Location: Brisbane, Queensland, Australia
Contact:

### Re: Explain the dual comma symbols

You mention using (nai nao) for prime 19. I'm not aware of a 19-comma in its range. There is however the 19-schisma (512:513) whose symbol is (rai rao)—flipped horizontally and a little narrower.

cam.taylor
Posts: 51
Joined: Thu Sep 03, 2015 11:55 am

### Re: Explain the dual comma symbols

Sorry, conflated the two at the time. Guess it's been too long since I've been actively using all these symbols. Time to get back into it!