Re: Numbering related equations with subindexes (2.1, 2.2 etc.)

[Paul A. Rubin]

Micha Feigin wrote:

I have some related equations that I would like to number 2.1, 2.2 etc. instead
of 2, 3 as the other equation numbers run. Is this possible?

i.e something like

a = b (1)

blah blah

c = b (2.1)
c = d (2.2)

some more blah

e = mc^2 (3)


Thanks

/Paul

The amsmath package gives you a "subequations" environment. By default, it adds a letter to equation numbers, but you can modify that. I've attached an example (from LyX 1.5.0rc1 -- let me know if you're on 1.4.x and can't load it).

subequations.lyx
Description: application/lyx