# 359th Fighter Group by Jack H. Smith By Jack H. Smith

Nicknamed the 'Unicorns', the 359th FG was once one of many final teams to reach within the united kingdom for carrier within the ETO with the 8th Air strength. First seeing motion on thirteen December 1943, the gang at the beginning flew bomber escort sweeps in P-47s, prior to changing to the ever present P-51 in March/April 1944. all through its time within the ETO, the 359th used to be credited with the destruction of 351 enemy airplane destroyed among December 1943 and will 1945. The exploits of all 12 aces created by means of the gang are unique, besides the main major missions flown. This ebook additionally discusses some of the markings worn via the group's 3 squadrons, the 368th, 369th and 370th FSs

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The Principle of Least Action in Quantum Mechanics 21 On the other hand, since for the expression (27) we get, sin ω(T − t) sin ωs ∂Iy δx(t) =− δy(s) mω sin ωT ∂y s sin ω(T − s) sin ωt ∂Iy mω sin ωT ∂x s =− if s < t if s > t , (34) we may conclude, since (34) satisﬁes (32), that an action does exist if the oscillator has a given initial and a given ﬁnal position. In fact, we may solve equation (31) with x(t) expressed as in (27) and obtain, as an expression for the action, T A = sin ω(T − t)x(0) + sin ωtx(T ) γ(t)dt sin ωT T [Ly + Lz ]dt + 0 − 0 T 1 mω sin ωT t dt 0 ds · sin ω(T − t) sin ωsγ(s)γ(t) .

That is to say, for inﬁnitesimal a, if the coordinates qn are changed to qn + ayn the action is left unchanged; A [qn (σ)] = A [qn (σ) + ayn (σ)] . (13) For example, if the form of the action is unchanged if the particles take the same path at a later time, we may take, q n (t) → qn (t+a). In this case, for small a, qn (t) → qn (t) + aq˙n (t) + . . so that yn = q˙n (t). For each such continuous set of transformations there will be a constant of the motion. If the action is invariant with respect to change from q(t) to q(t + a), then an energy will exist.

2 24 Feynman’s Thesis — A New Approach to Quantum Theory This may be immediately generalized to the case where there are a number of particles yk . The action,   ∞ m  (Lyk + Iyk ηyk ) + (η˙ yk η˙yl − ω 2 ηyk ηyl ) dt 2 −∞ k k l=k will lead to interactions only between pairs of particles k, l, no terms arising corresponding to the action of a particle on itself. These action expressions will be of importance in the next part of the paper when we discuss them quantum mechanically. Starting with a system with a Hamiltonian, we have, at least classically, found a corresponding non-Hamiltonian action principle, by leaving out one member of the system.