If there is more than one particle, an equation in the form of equation (91) must be written for each particle, and the solution will involve finding the six variables x, y, z, px, py, and pz, for each particle as a function of time, each once again subject to some initial condition.
The three p orbitals of a given shell are often designated px, py, or pz according to the alignment of their lobes along one of three mutually perpendicular axes.
To complete the solution, the value of each quantity px, py, pz, x, y, and z must be known at some definite time, say, t = 0.
Astatine in the +1 state is stabilized by complexation, and complexes formulated as dipyridine astatine perchlorate [At(py)2] [ClO4] and dipyridine astatine nitrate [At(py)2] [NO3] have been prepared.
NORDSTRUM (with a roar of laughter): Py yimminy, he tal dat story twenty time to me tonight!
By assuming that the ECB chooses nominal GDP, we get an aggregate demand curve for the euro area as a whole: Py = Y, where P is the price level, y is real GDP, and Y is the target nominal GDP.
THE FALCONE FLYOVER: This steel catwalk, named after the donors Philip A. and Lisa Maria Falcone, will take people eight feet up above the High Line from 25th Street to 26th Street (seen at its northern end in the photo above), moving them through a cano- py of magnolia trees and between two tall warehouse buildings, with glimpses of a hidden smokestack and passageways to the west.
A couple of centuries later, in the late 1990s, scholars poking around in the archives of the San Fernando Royal Academy of Fine Arts in Madrid determined that the mysterious initials PY, inscribed on many objects in the collection, stood for Presa Ynglesa, the English Prize.
D4 follows from the Principle of the Indiscernibility of Identicals (a.k.a. Leibniz's Law): ∀x∀y(x=y → ∀P(Px iff Py)).
As a simple example, note dy/dx + Py = Q, in which P and Q can be constants or may be functions of the independent variable, x, but do not involve the dependent variable, y.
There's also wine: I have a slurp of respectable Domaine Py Merlot (a bit steep at £4 for a small glass?).
