RESONANCE
In Hexagram Theory, whenever a line meets the same line value they have a common theme and resonate to each other. The resonances in lines are the 1/1, 2/2, 3/3, 4/4, 5/5 and 6/6. (see Dissonance and Harmony)
Расширенный Рейв Словарь
Expanded Rave Dictionary