Therefore, the structure that emerges from this partition is at the shiur koma, at the structural height, of Ḥokhma alone, which is called “Havaya of Ab of Adam Kadmon,” or the “partzuf of Ab of Adam Kadmon.” As explained in section #22# above, the structural height of Ḥokhma that emerges from the partition of the third level lacks the vessel of Malkhut among the vessels and the light of yeḥida from among the lights, which is the light of Keter; see there. Thus, the partzuf of Ab lacks the last level of the vessels of the previous, upper partzuf, and the highest level of the lights of that upper partzuf. Due to this great difference in form, the lower partzuf is regarded as distinct from the upper partzuf.
Adam — The Tree of Life
Petichah LeChokhmat HaKabbalah 40:3