Can someone please explain what the three dots mean? I knew this at some point but I have memory issues so I have to relearn things a lot.
U (θ) = UL(θL) ··· U2(θ2)U1(θ1)
|ψ〉 = ] φp ∈{φ} aφ1···φη |φ1 · · · φi · · · φj · · · φη〉 = (−1)π × ] φp ∈{φ} aφ1···φη |φ1 · · · φj · · · φi · · · φη〉
These equations are quantum computing equations. So it is using wavefunctions and Bra-Ket notation.