[texhax] skip after/before environment

[Victor Ivrii]

On 6/8/06, Uwe Lück <uwe.lueck at web.de> wrote:
> At 12:05 08.06.06, Victor Ivrii wrote:
> >I use environment claim introduced by
> >
> >\newenvironment{claim}[1][{\rm(\theequation)}]{\refstepcounter{equation}\vglue10pt
> >\begin{trivlist}
> >\item[{\hskip\labelsep#1}]}{\end{trivlist}\vglue10pt}
> >
> >
> >so it is a piece of the regular (mathematical) text, separated from
> >the rest by two vskips and numbered as if it was an equation.
> >
> >The trouble comes if either I use
> >
> >\begin{claim}
> >blah-blah-blah-blah-blah-blah-blah-blah-
> >\end{claim}
> >\begin{claim}
> >blah-blah-blah-blah-blah-blah-blah-blah-
> >\end{claim}
> >
> >
> >then the distance between these claims is too large (fixing it
> >manually by negative vskip is not a regular thing) or if
> >
> >\begin{claim}
> >blah-blah-blah-blah-blah-blah-blah-blah-
> >\begin{equation}
> >1+1=2
> >\end{equation}
> >\end{claim}
> >ho-ho-ho
> >
> >when the distance between equation in the end of claim and the next
> >line is too large again and again fixing it manually by negative vskip
> >is not a regular thing.
>
> \vglue10pt should be replaced by \addvspace{10pt} .


Thanks: I got the desired result discarding the first \vglue and
replacing the second one

>
> Indeed, I consider this possibility one of the greatest advantages
> of (La)TeX over that product whose name I have forgotten by that
> software company whose name I have forgotten.
>
> However: A \trivlist is surrounded by the \topsep (or even \partopsep)
> space anyway -- so you might think that \addvspace{10pt} is wrong.
> Doesn't changing \topsep (\partopsep) satisfy you?

\let\partopsep=\topsep was too strong medicine while \let\topsep=\partopsep
has an opposite effect

> (This affects all lists and \trivlist's.) If not, just increase the argument
> of \addvspace.




>
> HTH -- Uwe.
>
>


-- 
========================
Victor Ivrii, Department of Mathematics, University of Toronto