Hello,

I have a lie algebra, e.g. sl2 or sl3. Elements of these algebra may look like  Q_s, where x indicates a Generator of the lie algebra and 's' is a further index. On this latter index there are conditions, for example:

For all x and s with s>1: Q_s = 0.

In addition, under the lie algebra commutation relations, 's' behaves for example as:

[ Q_s, Q_r] = Q_s+r.