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### 6. Installation and auxiliary functions

#### 6.1 Requirements

The RCWA package needs at least GAP 4.4.7, ResClasses 2.2.2, GRAPE 4.0 [S02] and GAPDoc 0.999 [LN02]. It can be used under UNIX, under Windows and on the MacIntosh. RCWA is completely written in the GAP language and does neither contain nor require external binaries. In particular, warnings concerning missing binaries when GRAPE is loaded can savely be ignored.

#### 6.2 Installation

Like any other GAP package, RCWA must be installed in the `pkg` subdirectory of the GAP distribution. This is accomplished by extracting the distribution file in this directory. If you have done this, you can load the package as usual via `LoadPackage( "rcwa" );`.

#### 6.3 The Info class of the package

##### 6.3-1 InfoRCWA

`> InfoRCWA` | ( info class )

This is the Info class of the RCWA package. See section Info Functions in the GAP Reference Manual for a description of the Info mechanism. For convenience: `RCWAInfo(`n`)` is a shorthand for `SetInfoLevel(InfoRCWA`,n`)`.

#### 6.4 The testing routine

##### 6.4-1 RCWATest

`> RCWATest`( ) | ( function )

Returns: Nothing.

Performs tests of the RCWA package. Errors, i.e. differences to the correct results of the test computations, are reported. The processed test files are in the directory `pkg/rcwa/tst`.

#### 6.5 Building the manual

The following routine is a development tool. As all files it generates are included in the distribution file anyway, users will not need it.

##### 6.5-1 RCWABuildManual

`> RCWABuildManual`( ) | ( function )

Returns: Nothing.

This function builds the manual of the RCWA package in the file formats LaTeX, DVI, Postscript, PDF, HTML and ASCII text. This is accomplished using the GAPDoc package by Frank Lübeck and Max Neunhöffer. Building the manual is possible only on UNIX systems and requires LaTeX, PDFLaTeX and dvips.

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