Text Formatting ⇒ Proposition, Theorem, etc numbering and \ref

[lalop]

I'm using the memoir class with amsmath, amssymb, amsthm.

I have two questions:

1) When I index the theorem by page, specifically

Code: Select all

\newtheorem{thm}{Theorem}[page]

\newtheorem{lem}[thm]{Lemma} %to be part of the same numbering scheme
\newtheorem{cor}[thm]{Corollary}
...
etc

so that the theorems come out like Theorem 15.2 (15th page, 2nd item), the numbering has a tendency to commonly overspill to the next page. For example, the first item on page 15 is usually Theorem 14.6. It's really only a problem with spilling over to the topmost item on a page. Does anyone have any suggestions on how to fix/minimize this?


2) Does anyone know how to make it so using \ref{theoremlabel} gives not only the number, but the type as well? For instance, "Corollary 9.2" instead of just "9.2".



Thanks beforehand.

[gmedina]

Hi,

the first problem comes from the asynchronous mechanism that LaTeX uses to build the document pages. I'll think about this.

...2) Does anyone know how to make it so using \ref{theoremlabel} gives not only the number, but the type as well? For instance, "Corollary 9.2" instead of just "9.2"...

Use the ntheorem package and the \thref command.

[lalop]

Hm, the option thmmarks seems to conflict with \tag in the \[ \] environment; it comes with an error saying tag isn't allowed.

Current options: [amsmath,amsthm,thref,thmmarks] or [amsmath,plain,thref,thmmarks]


[It's not that terribly great a problem, I guess, since I can just define my own command to test the actual label.]

[gmedina]

By now you should be aware of the relevance of providing minimal and complete code and not just useless snippets. The following code works OK for me:

Code: Select all

\documentclass{book}
\usepackage{amsmath}
\usepackage[amsmath,amsthm,thref,thmmarks]{ntheorem}

\begin{document}

\[ a=b \]

\end{document}

If you are experiencing some problem, please give us some minimal and complete code allowing us to easily reproduce the undesired behaviour.

[lalop]

...

Try:

Code: Select all

\documentclass{book}
\usepackage{amsmath}
\usepackage[amsmath,amsthm,thref,thmmarks]{ntheorem}

\begin{document}

\[ a=b \tag{hi} \]

\end{document}

[daleif]

that has nothing to do with ntheorem, you cannot add a tag (which would override an equation number) inside an environment that does not provide equation numbers.

[lalop]

It does work, though, if you remove the ntheorem line:

Code: Select all

\documentclass{book}
\usepackage{amsmath}

\begin{document}

\[ a=b \tag{hi} \]

\end{document}

[daleif]

to me that is an error (or undocumented feature)

[lalop]

oh well : x as i said, i can customize \thref instead