# Talk:Normal lists/WikispacesArchive

# ARCHIVED WIKISPACES DISCUSSION BELOW

**All discussion below is archived from the Wikispaces export in its original unaltered form.**

Please do not add any new discussion to this archive page.

All new discussion should go on Talk:Normal lists.

## should this say "strictly decreasing?"

"(4) F is an increasing function of the column number i, and becomes strictly increasing after F(i) becomes positive."

If F(i) returns the first nonzero entry in the ith column of H, but counting from the bottom, and if H is upper triangular, that means that the first nonzero entry for each column should be getting closer to the bottom as you move further towards the right.

Hence, shouldn't F be strictly -decreasing- after F(i) becomes positive, not increasing, if we're counting from the bottom?

- **mbattaglia1** September 26, 2011, 07:47:39 PM UTC-0700

"Counting up from the bottom" means counting up rows, whereas F(i) is a function of columns.

- **genewardsmith** September 27, 2011, 08:50:07 AM UTC-0700

So what do you mean that "F becomes strictly increasing?" Do you mean F(i) becomes strictly increasing, e.g. the row returned by function F evaluated at column i?

- **mbattaglia1** September 27, 2011, 09:10:47 AM UTC-0700

## No examples here

There are no examples of normal lists on this page.

- **clumma** April 09, 2011, 08:20:09 PM UTC-0700

In fact, it is very difficult to find any examples of normal val lists on this wiki, and I have been unsuccessful in finding a normal comma list.

- **clumma** April 09, 2011, 08:24:23 PM UTC-0700

There are tons of examples of normal val lists everywhere on the wiki, though not labeled as such. Fewer normal comma lists, but they are there. Lots of examples of normal interval lists which are not for commas on the subgroup pages.

- **genewardsmith** April 10, 2011, 11:03:10 AM UTC-0700

I added some stuff to the normal lists page. A tree diagram would be nice, but I'm not so great at drawing upside down trees.

- **genewardsmith** April 10, 2011, 11:27:02 AM UTC-0700

thanks Gene!

- **clumma** April 10, 2011, 05:36:22 PM UTC-0700