# zsi man page

zsi — sum and intersection of spaces

## Synopsis

**zsi** [Options] *<Space1> <Space2> <Sum> <Int>*

## Description

This program reads in two spaces from *Space1* and *Space2* and writes out their sum and intersection, in semi-echelon form, to *Sum* and *Int*, respectively. The input files must be matrices over the same field and with the same number of columns. They need not be in echelon form.

There must be enough memory to hold two copies of each of the two spaces at the same time.

## Options

**-Q**- Quiet, no messages.
**-V**- Verbose, more messages.
**-T***<MaxTime>*- Set CPU time limit

## Input Files

*Space1*- The first space.
*Space2*- The second space.

## Output Files

*Sum*- The sum of the spaces.
*Int*- The intersection of the spaces.

## Info

MeatAxe 2.4.24