# Download and Installation¶

The current version of RISCErgoSum is 1.1.5.

## Registration¶

The download is password protected. To get the password, send an email to Peter Paule . It will be given for free to all researchers and non-commercial users.

Note that redistribution of RISCErgoSum is not allowed.

## Short Instruction¶

Get one of the files riscergosum-1.1.5.tgz or
riscergosum-1.1.5.zip from
http://www.risc.jku.at/research/combinat/software/source/mathematica/ergosum
and extract it in the `Applications`

subdirectory of your local
Mathematica `$UserBaseDirectory`

.

## Detailed Instruction¶

Start Mathematica and type:

```
$UserBaseDirectory
```

at the command prompt.

Suppose this value is `/home/hemmecke/.Mathematica`

. Exit
Mathematica and extract the .tgz file into the `Applications`

subdirectory.

Under Linux (substitute appropriately):

```
tar xvzf riscergosum-x.y.z.tgz -C /home/hemmecke/.Mathematica/Applications
```

Under MacOS the output from `$UserBaseDirectory`

will most probably
look similar to `/Users/hemmecke/Library/Mathematica`

.
Thus, in a terminal type:

```
tar xvzf riscergosum-x.y.z.tgz -C /Users/hemmecke/Library/Mathematica/Applications
```

Note that the `Library`

folder is usually hidden in the file browser.

Under Windows (substitute appropriately) unzip the
`riscergosum-x.y.z.zip`

and move the files (and subdirectories) to
`$UserBaseDirectory/Applications`

.

After extracting the files into the `Applications`

subdirectory, you
should find there the subdirectories

```
Applications/RISC
Applications/InvEulerPhi
```

and in particular the file

```
Applications/RISC/MultiSum.m
```

If you don’t see `RISC`

and `InvEulerPhi`

directly under
`Applications`

, then something went wrong and the following will not
work.

Start Mathematica and type:

```
<< RISC`MultiSum`
```

You should then see something like:

```
Package MultiSum version 2.3 written by Kurt Wegschaider
enhanced by Axel Riese and Burkhard Zimmermann
Copyright 1995-2009, Research Institute for Symbolic Computation (RISC),
Johannes Kepler University, Linz, Austria
```