The Centernot Package Manual 3
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The centernot package Heiko Oberdiek∗2016/05/16 v1.4 Abstract This package provides \centernot that prints the symbol \not on the following argument. Unlike \not the symbol is horizontally centered. Contents 1 User interface 1 2 Implementation 2 3 Installation 3.1 Download . . . . . . . . . . . . 3.2 Bundle installation . . . . . . . 3.3 Package installation . . . . . . 3.4 Refresh file name databases . . 3.5 Some details for the interested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Catalogue 5 History [2006/12/02 [2007/05/31 [2010/03/29 [2011/07/11 [2016/05/16 4 v1.0] v1.1] v1.2] v1.3] v1.4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Index 1 2 2 3 3 3 3 . . . . . . . . . . 4 4 4 4 5 5 5 User interface If a negated relational symbol is not available, \not can be used to create the negated variant of the relational symbol. The disadvantage of \not is that it is put at a fixed location regardless of the width of the relational symbol. Therefore \centernot takes an argument and measures its width to achieve a better placement of the symbol \not. Examples: symbol = \parallel \longrightarrow \not 6= 6k 6−→ \centernot 6= 6k −→ 6 (definition) But do not forget that most negated symbols are already available, e.g.: ∗ Please report any issues at https://github.com/ho-tex/oberdiek/issues 1 case \parallel: \mid: \rightarrow: 2 package centernot amssymb centernot amssymb mathabx centernot amssymb mathabx code $A \centernot\parallel B$ $A \nparallel B$ $A \centernot\mid B$ $A \nmid B$ $A \notdivides B$ $A \centernot\rightarrow B$ $A \nrightarrow B$ $A \nrightarrow B$ result A6k B A∦B A6 | B A-B A ffl B A 6→ B A9B AÛB Implementation 1 h*packagei \NeedsTeXFormat{LaTeX2e} 3 \ProvidesPackage{centernot} 4 [2016/05/16 v1.4 Centers the not symbol horizontally (HO)]% 2 \not is a \mathrel atom with zero width. It prints itself outside its character box, similar to \rlap. The next \mathrel symbol is then print on top of it. TEX does not add space between two \mathrel atoms. The following implementation assumes that the math font is designed in such a way that the position of \not fits well on the equal symbol. The blue boxes marks the character bounding boxes seen by TEX: \not = \not= 6 = 6= \centernot \centernot is not a symbol but a macro that takes one argument. It measures the width of the argument and places \not horizontally centered on that argument. The result is a \mathrel atom. \newcommand*{\centernot}{% \mathpalette\@centernot 7} 8 \def\@centernot#1#2{% 9 \mathrel{% 10 \rlap{% 11 \settowidth\dimen@{$\m@th#1{#2}$}% 12 \kern.5\dimen@ 13 \settowidth\dimen@{$\m@th#1=$}% 14 \kern-.5\dimen@ 15 $\m@th#1\not$% 16 }% 17 {#2}% 18 }% 19 } 5 6 20 h/packagei 3 Installation 3.1 Download Package. This package is available on CTAN1 : CTAN:macros/latex/contrib/oberdiek/centernot.dtx The source file. CTAN:macros/latex/contrib/oberdiek/centernot.pdf Documentation. 1 http://ctan.org/pkg/centernot 2 Bundle. All the packages of the bundle ‘oberdiek’ are also available in a TDS compliant ZIP archive. There the packages are already unpacked and the documentation files are generated. The files and directories obey the TDS standard. CTAN:install/macros/latex/contrib/oberdiek.tds.zip TDS refers to the standard “A Directory Structure for TEX Files” (CTAN:tds/ tds.pdf). Directories with texmf in their name are usually organized this way. 3.2 Bundle installation Unpacking. Unpack the oberdiek.tds.zip in the TDS tree (also known as texmf tree) of your choice. Example (linux): unzip oberdiek.tds.zip -d ~/texmf Script installation. Check the directory TDS:scripts/oberdiek/ for scripts that need further installation steps. Package attachfile2 comes with the Perl script pdfatfi.pl that should be installed in such a way that it can be called as pdfatfi. Example (linux): chmod +x scripts/oberdiek/pdfatfi.pl cp scripts/oberdiek/pdfatfi.pl /usr/local/bin/ 3.3 Package installation Unpacking. The .dtx file is a self-extracting docstrip archive. The files are extracted by running the .dtx through plain TEX: tex centernot.dtx TDS. Now the different files must be moved into the different directories in your installation TDS tree (also known as texmf tree): centernot.sty → tex/latex/oberdiek/centernot.sty centernot.pdf → doc/latex/oberdiek/centernot.pdf centernot.dtx → source/latex/oberdiek/centernot.dtx If you have a docstrip.cfg that configures and enables docstrip’s TDS installing feature, then some files can already be in the right place, see the documentation of docstrip. 3.4 Refresh file name databases If your TEX distribution (teTEX, mikTEX, …) relies on file name databases, you must refresh these. For example, teTEX users run texhash or mktexlsr. 3.5 Some details for the interested Unpacking with LATEX. The .dtx chooses its action depending on the format: plain TEX: Run docstrip and extract the files. LATEX: Generate the documentation. If you insist on using LATEX for docstrip (really, docstrip does not need LATEX), then inform the autodetect routine about your intention: latex \let\install=y\input{centernot.dtx} Do not forget to quote the argument according to the demands of your shell. 3 Generating the documentation. You can use both the .dtx or the .drv to generate the documentation. The process can be configured by the configuration file ltxdoc.cfg. For instance, put this line into this file, if you want to have A4 as paper format: \PassOptionsToClass{a4paper}{article} An example follows how to generate the documentation with pdfLATEX: pdflatex centernot.dtx makeindex -s gind.ist centernot.idx pdflatex centernot.dtx makeindex -s gind.ist centernot.idx pdflatex centernot.dtx 4 Catalogue The following XML file can be used as source for the TEX Catalogue. The elements caption and description are imported from the original XML file from the Catalogue. The name of the XML file in the Catalogue is centernot.xml. 21 h*cataloguei 23 24 25 46 h/cataloguei 22 5 History [2006/12/02 v1.0] • First version. [2007/05/31 v1.1] • Real symbols added in documentation part. [2010/03/29 v1.2] • Documentation fix: ‘negotiated’ to ‘negated’ (Hartmut Henkel). 4 [2011/07/11 v1.3] • Superfluous \makeatother removed (Martin Münch). [2016/05/16 v1.4] • Documentation updates. 6 Index Numbers written in italic refer to the page where the corresponding entry is described; numbers underlined refer to the code line of the definition; plain numbers refer to the code lines where the entry is used. Symbols \@centernot . . . . . . . . . . . . . . . . . . 6, 8 \mathrel . . . . . . . . . . . . . . . . . . . . . . 9 N \NeedsTeXFormat . . . . . . . . . . . . . . . 2 \newcommand . . . . . . . . . . . . . . . . . . 5 \not . . . . . . . . . . . . . . . . . 15, 26, 33, 34 C \centernot . . . . . . . . . . . . . . . . . . 5, 32 D \dimen@ . . . . . . . . . . . . . 11, 12, 13, 14 K \kern . . . . . . . . . . . . . . . . . . . . . \ProvidesPackage P ............... 3 R \rlap . . . . . . . . . . . . . . . . . . . . . . . . 10 12, 14 M \m@th . . . . . . . . . . . . . . . . . . 11, 13, 15 \mathpalette . . . . . . . . . . . . . . . . . . . 6 S \settowidth . . . . . . . . . . . . . . . . 5 11, 13centernot 26Centred \not command. 2728 29 30 31 32 The package provides \centernot that prints the symbol 33 \not on the following argument. Unlike the default 34 \not command, the symbol is horizontally centered. 35 36 The package is part of the 39oberdiek 37 bundle. 3841 42 43 44 45
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