From the Z-papers by Herb Zinser

Notice his body  language    bio-math signal  .....  for

The imaginary unit or unit imaginary number, denoted as i, is a mathematical concept which extends the real number system ℝ to the complex number system ℂ, which in turn provides at least one root for every polynomial P(x)     (see algebraic closure and fundamental theorem of algebra). The imaginary unit's core property is that i² = −1.

i in the complex or cartesian plane. Real numbers lie on the horizontal axis, and imaginary numbers lie on the vertical axis

There are in fact two complex square roots of −1, namely i and −i, just as there are two complex square roots of every other real number, except zero, which has one double square root.

Imaginary unit

Notice his bio-math name ........   Pier O --> except zero, which has one double square root ...... thus suggesting he is a secret  DOUBLE AGENT for mathematics   ....  
working at FermiLAB   near DuPage County   ...... identifier DuPage --> Duplicate  or Double  Page  .................... thus his double square root identity fits right into that mathematical-physics geography region of Landau geo-physics and bio-physics.