Emptiness in the Aro gTér

"The Aro gTér is unique, so far as I know, in organizing its explanations of form and emptiness around the five elements of Dzogchen (or equivalently the five Buddha Families of Tantra). Form is explained in terms of the five qualities of solidity, permanence, separateness, continuity, and definition. Emptiness is explained in terms of the seeming opposites—insubstantiality, transience, boundarilessness, discontinuity, and ambiguity. Although the Aro gTér sometimes speaks of existence and non-existence, its main explanations are in terms of these ten qualities of experience, instead."

http://approachingaro.org/aro-gter-emptiness