X-Git-Url: http://gitweb.michael.orlitzky.com/?p=mjotex.git;a=blobdiff_plain;f=mjo-topology.tex;h=760d44d96c4bbead22746a24b5712faa16478efa;hp=9ea5ff1d99f60e273dcb511b88049aa859a57291;hb=6759e3a5bd5fd13bd239ee851c66d1eac83a7c1b;hpb=af7e58d88448fa6726d8e6df22b280390e0a5a34 diff --git a/mjo-topology.tex b/mjo-topology.tex index 9ea5ff1..760d44d 100644 --- a/mjo-topology.tex +++ b/mjo-topology.tex @@ -1,17 +1,24 @@ % % Standard topological operations. % +\ifx\havemjotopology\undefined +\def\havemjotopology{1} -% Needed for \operatorname. -\usepackage{amsopn} + +\ifx\operatorname\undefined + \usepackage{amsopn} +\fi \input{mjo-common} % The ``interior of'' operator. -\newcommand*{\interior}[1]{ \operatorname{int} \of{{#1}} } +\newcommand*{\interior}[1]{ \operatorname{int}\of{{#1}} } % The ``closure of'' operator. -\newcommand*{\closure}[1]{ \overline{{#1}} } +\newcommand*{\closure}[1]{ \operatorname{cl}\of{{#1}} } + +% And the ``boundary of'' operator. +\newcommand*{\boundary}[1]{ \operatorname{bdy}\of{{#1}} } + -% And the boundary operator. -\newcommand*{\boundary}[1]{ \partial \of{{#1}} } +\fi