- $a, b$ – real number, such that: $|b| < |a|$
- $p, q$ – two (hypothetically also the same) entities
- $A$ – a choice of action
- $\vec{pAq}$ – action $A$ of $p$ on $q$
Also, below $int_1$ is an action, and $int_2$ – reaction
Action

Opposition – reaction opposing direction of the initial action
Reversion, underpower – initial action vector with a larger magnitude, than the reaction vector to it

Equalisation, impasse – reaction of neutralisation of the impact of the initial action

Inversion, overpower – reaction stronger than the initial action

Imitation – reaction, with the same direction, as the initial action vector

Lack of reaction

The notation may not currently appear as completely well-defined, but I think the very idea is rather clear.
In one of the future posts, I would like to explain the idea behind the vector treatment of action of entity p on q ($\vec{pAq})$.
PS. It seems, that astrological modalities of Cardinal, Fixed and Mutable are cases of those actions and reactions. Anybody has some ideas about their definitions?
This post will probably yet be updated