Ok thank you dears. Yes, right! Tibetan school. Main referring texts on the matter: Vashubhandu's Abhidarmakosha as reported and commented by the First Dalai Lama Gedun Drub; and Maitreya's Abhisamayalamkara as reported and commented by Haribadra first and Gyeltsab Je afterwards. With all the sutras extensively quoted there, from which Samdhinirmocanasutra (Sutra Unraveling the Thought), Prajnaparamitasutra, Lankavatarasutra ecc. (there are really many).
Both Abhidhama (Vaibashika school) and Abhisamaya (Svatantrika-Madhyamilka school) describe the system of the Twenty Sangha, which explains that in order to become a stream enterer one has first have entered the gate of the Hearer Vehicle at least; such a gate is qualified by having reached the immovable concentrative equipoise on renunciation which can happen only on the basis of shamata/shinè/calm abiding realization. In the case of the gate for the Bodhisattva vehicle, the required attainments are different but still on the basis of calm abiding.
I totally understand that different schools give different meaning to all these terms,
that's why I am asking which is the meaning that is given HERE. I checked in the site but all of such topics are not open to my kind of subscription (they are marked in red). I have already sent a message to Daniel & Adam in order to request such permission ( no response until now).
Thank you anyway for having made me refreshing my materials in order to respond your questions!
Love