I would like something like this amsthm: \newtheoremstyle, headspace, \mbox{}, and lists but also with an indent after the new line, as if I wrote ~ and pressed enter twice. Ideally without ntheorem. I tried

\newtheoremstyle{break}  % follow `plain` defaults but change HEADSPACE.
{\topsep}   % ABOVESPACE
{\topsep}   % BELOWSPACE
{\itshape}  % BODYFONT
{0pt}       % INDENT (empty value is the same as 0pt)
{\bfseries} % HEADFONT
{.}         % HEADPUNCT
{\linebreak}  % HEADSPACE. `plain` default: {5pt plus 1pt minus 1pt}
{}          % CUSTOM-HEAD-SPEC

but this gives a weird error about a number missing. A sub question is what LaTeX command gives the same result as pressing enter twice?

  • 1
    a compilable example would really help here. also, try \newline instead of \linebreak for the next-to-last argument; that's what is generally recommended, but i don't have time to investigate why. – barbara beeton Aug 28 '17 at 13:46
  • See the link for a compilable example, but this has \newline instead of what I want. – Richard Birkett Aug 28 '17 at 13:57
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    answer to sub-question: \par is the (la)tex equivalent to a blank line. an alternate form (essentially a primitive, without all the latex addenda) is \endgraf; this is usable in situations where \par or a blank line are not "accepted". – barbara beeton Aug 28 '17 at 15:08
  • Thanks. Although \par gives the same error in the newtheoremstyle – Richard Birkett Aug 28 '17 at 20:19
  • i took your sub-question to mean "more generally". none of the methods i mentioned would work in a \newtheoremstyle definition that i'm aware of, except possibly in the last, "custom", argument. but even there, it's questionable. there is a "break" theorem style defined in the amsthm users guide, although it doesn't indent the next line. it does use \newline. i will experiment. – barbara beeton Aug 28 '17 at 21:00

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