protected override Algebraic Add(Algebraic x)
{
if (x.IsScalar())
{
x = x.Promote(this);
}
if (x is Matrix && Equalsized(( Matrix )x))
{
var b = CreateRectangularArray <Algebraic>(a.Length, a[0].Length);
for (int i = 0; i < a.Length; i++)
{
for (int k = 0; k < a[0].Length; k++)
{
b[i][k] = a[i][k] + (( Matrix )x).a[i][k];
}
}
return(new Matrix(b));
}
throw new SymbolicException("Wrong arguments for add:" + this + "," + x);
}