# hellerTompkins: Determine if a matrix is totally unimodular using Heller and... In deducorrect: Deductive Correction, Deductive Imputation, and Deterministic Correction

## Description

This function is deducorrect internal

## Usage

 1 hellerTompkins(A) 

## Arguments

 A An object of class matrix in \{-1,0,1\}^{m\times n}. Each column must have exactly 2 nonzero elements. (This is tested by isTotallyUnimodular).

## Value

TRUE if matrix is unimodular, otherwise FALSE

isTotallyUnimodular