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Exact smooth superharmonic counterpoised dust family

Statement

Assume ACω as in The Axiom of Countable Choice (ACω), as required by the currently inspected general geometric convention in Smooth formal matter, EM tensors and observer quantities. Let D⊆R3 be open and let H∈C∞(D,(0,∞)) satisfy ΔH≤0. Use M=R×D, its coordinate orientation, and the time orientation for which n:=H∂0 is future, all as fixed in Positive-scalar conformastatic chart data and verified in The positive-scalar conformastatic chart tensor is Lorentzian. Use the metric gH and coordinates x0=ct,xi of Positive-scalar conformastatic chart data. Fix formal constants c,μ0,GN>0, put ϵ0=(μ0c2)−1, κ=8πGN/c4, and define the positive charge-to-mass parameter Qs:=4πϵ0GN using the positive root of Explicit rational and real power regimes. For a sign s∈{−1,+1} set A:=scQsH−1dx0,F:=dA,U:=cH∂0,ρ:=−c2ΔH4πGNH3,σ:=sQsρ,j:=σU,Tmab:=ρUaUb. Let ab:=Ua∇aUb be the covariant four-acceleration of the timelike field U. Then U=cn is future timelike with gH(U,U)=−c2, all displayed fields are smooth, and ρ≥0. On {ρ>0} the charge-to-mass ratio is σ/ρ=sQs; no ratio is defined by division at ρ=0. The tuple satisfies the formal sourced Maxwell equations dF=0, ∇aFab=−μ0jb, the dust matter exchange equation ∇aTmab=Fbcjc, and the formal Einstein equation with Λ=0, Gab=κ(Tm,ab+TabEM), where TEM is exactly the tensor of Smooth formal matter, EM tensors and observer quantities. Its total stress satisfies WEC, NEC, SEC, and DEC. The coordinate four-acceleration of the static dust field is a0=0, ai=−c2Hi/H3, and its Lorentz force per unit mass balances it wherever ρ>0; the undivided exchange identity also holds where ρ=0.

This is a conditional mathematical solution family for the stated formal equations. It makes no claim of physical realization, equilibrium stability, or coupled-field existence for arbitrary initial data.

Facts & Assumptions

Given: The open set D, smooth positive H with ΔH≤0, constants c,μ0,GN>0, sign s∈{−1,+1}, and the coordinate data of the Statement.

[F1]

Smooth formal matter, EM tensors and observer quantities defines the pointwise formal sourced Maxwell equations dF=0, ∇aFab=−μ0jb, the matter-exchange equation ∇aTmab=Fbcjc, and the formal Einstein equation Gab+Λgab=κ(Tm,ab+TabEM). It also defines a local potential by dA=F. This current draft definition is used only at these exact equation interfaces.

[F2]

Explicit rational and real power regimes defines the unique positive square root and rational powers for positive real bases. Here Qs is the unique positive root of 4πϵ0GN, and negative integer powers of H mean reciprocals.

[F3]

Charged dust balance equivalence and advected charge ratio defines ab:=Ua∇aUb; on a region where ρ>0, the dust exchange equation is equivalent to continuity ∇a(ρUa)=0 and force balance ρab=σFbcUc. Its statement makes no division-based conclusion at ρ=0. This is the current draft theorem and is used only on its stated positive-density domain.

[F4]

EM, dust and perfect-fluid energy inequalities: the Maxwell tensor and a charged-dust tensor with ρ≥0 satisfy WEC, NEC, SEC, and DEC, and their sum retains each condition. This is the current draft theorem; no general matter positivity is assumed.

[F5]

Positive-scalar conformastatic chart data defines M, gH, Hi, q, and ΔH, with coordinate orientation and time orientation selected by n=H∂0.

[F6]

The positive-scalar conformastatic chart tensor is Lorentzian gives the inverse metric, nondegeneracy, the future unit vector n=H∂0, the orthonormal spatial frame ei=H−1∂i, and their orientation.

[F7]

Arbitrary-positive-H conformastatic Ricci and Einstein components gives the coordinate connection and the arbitrary-positive-H Ricci, scalar, and Einstein table in the curvature convention stated there.

[F8]

Existence and uniqueness of the metric-selected connection of a nondegenerate metric, and its extension to tensor fields: for a smooth nondegenerate metric, there is a unique torsion-free metric-compatible connection with the Christoffel formula in the statement; its induced tensor derivative has the displayed component rule, including ∇cFab=∂cFab+ΓadcFdb+ΓbdcFad.

[F10]

The local coordinate formula for the exterior derivative: for a coordinate one-form A=Aa dxa, (dA)ab=∂aAb−∂bAa.

[F11]

The exterior derivative squares to zero: for every smooth differential form A, d(dA)=0.

[F12]

Smooth formal matter, EM tensors and observer quantities defines TEMab=μ0−1(FacFbc−14gabFcdFcd) and in a positively oriented orthonormal tetrad uses F0i=−Ei/c.

[F13]

Smooth formal matter, EM tensors and observer quantities defines charged dust by Tmab=ρUaUb and ja=σUa, with ρ,σ∈C1, ρ≥0, and future-timelike U satisfying g(U,U)=−c2.

[A1]

The adopted background includes only ACω as stated in The Axiom of Countable Choice (ACω). The explicit global coordinates on R×D and every finite component calculation below use no stronger choice principle.

Proof

1.1givenF2F5F6F13A1algebra

Since H is smooth and positive, its reciprocal is smooth by Positive-scalar conformastatic chart data; ϵ0>0 and GN>0 make the positive root Qs well-defined by [F2]. The chart tensor is a smooth Lorentzian metric with the stated orientation by [F5] and [F6]. Thus U=cn is future timelike, and the formulas define smooth A,F,U,ρ,σ,j,Tm; they have the charged-dust form [F13], and ΔH≤0 gives ρ≥0.

1.2givenF1F6F9F10F11algebra

Write f=H−1. Differentiating Hf=1 in each spatial coordinate and using [F9] gives ∂if=−Hi/H2. The coordinate formula [F10] therefore gives the only nonzero covariant components Fi0=−s(c/Qs)Hi/H2 and F0i=s(c/Qs)Hi/H2. Raising indices with [F6] gives Fi0=s(c/Qs)Hi/H2 and F0i=−Fi0; all Fij vanish. Finally [F11] gives dF=d(dA)=0.

1.3F7F8

The connection used in the formal equations is the unique torsion-free metric-compatible connection by [F8]. The coefficients and compatibility of the local connection in [F7] were established in that item, so the two connections coincide; hence its component table may be used in the sourced equations below.

2.1givenF7F8step 1.2algebra

By the tensor derivative formula [F8], ∇aFab=∂aFab+ΓaacFcb+ΓbacFac, and the final term is zero because Γbac is symmetric in a,c while Fac is antisymmetric. From [F7], Γaai=2Hi/H and Γaa0=0. Hence ∇aFa0=∂i(scQsHiH2)+2HiHscQsHiH2=scQsΔHH2, because the two terms proportional to q/H3 cancel.

2.2givenF6F7F8F13step 1.2algebra

The field U=cH∂0 has g(U,U)=−c2 by [F13]. Its divergence is ∇a(ρUa)=∂0(ρcH)+Γaa0ρcH=0, since all fields are static. Its acceleration is ai=(cH)2Γi00=−c2Hi/H3 and a0=0. Moreover Fi0=gijFj0=−s(c/Qs)Hi/H4, hence σFicUc=sQsρFi0cH=−ρc2Hi/H3=ρai; the temporal components of both sides are zero. This undivided relation holds at every point, including ρ=0.

2.3givenF2F6F12step 1.2algebra

In the positively oriented orthonormal frame n=H∂0, ei=H−1∂i from [F6], the electric components are Ei=cF(ei,n)=−sc2Hi/(QsH2) and the magnetic components vanish because Fij=0. In that frame F0^i^=−Ei/c, FcdFcd=−2∣E∣2/c2, F0^cF0^c=∣E∣2/c2, and Fi^cFj^c=−EiEj/c2. Substitution into the stress-tensor formula [F12] yields TEM0^0^=ϵ0∣E∣22=ϵ0c4q2Qs2H4, TEM0^i^=0, and TEMi^j^=ϵ0c42Qs2H4(δijq−2HiHj). Using κ=8πGN/c4 and Qs2=4πϵ0GN gives κTEM0^0^=q/H4 and κTEMi^j^=(δijq−2HiHj)/H4.

3.1givenF1F2F13step 2.1algebra

The right side of the time component of the sourced equation [F1] is −μ0j0=−μ0sQsρcH=sμ0Qsc3ΔH/(4πGNH2) by the definitions in the Statement. The definitions give Qs2=4πGN/(μ0c2) by [F2], so μ0Qsc3/(4πGN)=c/Qs; this agrees with step 2.1. For each spatial i, F0i is static, Fji=0, Γaa0=0, and the symmetric-connection contraction is zero, so ∇aFai=0=−μ0ji. Thus all sourced Maxwell components hold.

3.2givenF1F3F8F13step 2.2algebra

On the open set {ρ>0}, step 2.2 verifies the two equivalent conditions in [F3], so the matter exchange equation [F1] follows there. At a point with ρ=0, the already verified divergence in step 2.2 makes Ub∇a(ρUa)=0, while ρab=0 and σFbcUc=0 because σ=sQsρ=0 by [F13]. The product rule ∇a(ρUaUb)=Ub∇a(ρUa)+ρab therefore proves the exchange equation on the zero-density set too.

3.3givenF1F7F13step 2.3algebra

In the same frame, Tm0^0^=ρc2 and Tm0^i^=Tmi^j^=0 by [F13], so κTm0^0^=8πGNρ/c2=−2ΔH/H3 by the density in the Statement. Consequently the total components are κ(Tm+TEM)0^0^=(q−2HΔH)/H4 and κ(Tm+TEM)i^j^=(δijq−2HiHj)/H4, with zero mixed components. In an orthonormal frame these numerical values equal the corresponding covariant components (the two time-index signs cancel), and they are exactly G(n,n), G(ei,ej) and G(n,ei) from [F7]. Thus the formal Einstein equation [F1] holds componentwise.

4.1givenF4F12F13step 1.1step 3.3∎

Since ρ≥0, [F4] applies to the Maxwell and dust tensors [F12, F13] separately and states that their sum satisfies WEC, NEC, SEC, and DEC. This is a conditional mathematical consequence of the formal model equations and the pointwise tensor definitions; it is not an empirical claim.

Remarks

The calculation checks every component of the formal Maxwell, dust-exchange, and Λ=0 Einstein equations. At ΔH=0, ρ=σ=0 and the formulas reduce to the source-free Maxwell branch without division by the density. The result does not supply PDE existence, stability, or a physical postulate.

Depends on

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