protected BigRational multiplyRow(int index) throws UndefinedMultiplyException {
BigRational result = BigRational.ZERO;
for (int j = 0; j < size.col; j++) {
if (!array[index][j].isZero()) {
if (basis.getNewValue(j + position.col).isPositive()) {
result = result.add((array[index][j].multiply(basis.getNewValue(j + position.col))));
} else if (basis.getNewValue(j + position.col).isUndefined()) {
throw new UndefinedMultiplyException();
}
}
}
return result;
}
private BigRational multiplyBlockRow(BigRational[][] array, int index, int starting_col)
throws UndefinedMultiplyException {
BigRational result = BigRational.ZERO;
int cols = array[0].length;
for (int j = 0; j < cols; j++) {
if (!array[index][j].isZero()) {
if (basis.getNewValue(j + starting_col).isPositive()) {
result = result.add((array[index][j].multiply(basis.getNewValue(j + starting_col))));
} else if (basis.getNewValue(j + starting_col).isUndefined()) {
throw new UndefinedMultiplyException();
}
}
}
return result;
}
