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Conditional ideal Planck emission and entropy accounting

Physical scope

Conditional exact conclusion in the zero-mode-excluded Planck/Gibbs ray model and fixed-asymptotic-reference positive-cutoff Schwarzschild effective-area ODE. The area entropy input is restricted to the stationary family interface, and the explicit AC_omega assumption is carried. The quasistatic ratio is an internal diagnostic, not an error bound against a dynamic Einstein solution. No actual Hawking flux, coupled backreaction, empirical observation, reference-independent Stefan law, or universal generalized second law is asserted.

Statement

Assume the ideal model and fixed asymptotic normalization of Ideal photon reservoir and active-area mass-balance model, and explicitly assume ACω as defined by The Axiom of Countable Choice (ACω). Use G=GN between the mathematical ODE input and the physical Schwarzschild family. Also assume the conditional family-entropy interface stated by Conditional area entropy coefficient with free offset with its actual hypotheses. Let SH(M) denote that state-function value at the stationary Schwarzschild member of mass M, and put

ΔSH:=SH(M0)−SH(Mmin⁡).

For the fixed-reference effective-area model,

P∞(M)=ηℏc615360πGN2M2,α=ηℏc415360πGN2,M(t∞)=(M03−3αt∞)1/3,τ=M03−Mmin⁡33α.

The model exports energy c2(M0−Mmin⁡) joules, and its coarse photon entropy satisfies

SH(M)=4πkBGNM2ℏc+s∗,s∗∈R constant on the stationary family, Srad(τ)=43ΔSH>0,Δ(SH+Srad)=13ΔSH>0.

The absolute entropy offsets in the mathematical ODE model and the stationary-family state function need not be identified; their differences agree because both have the same area coefficient on this branch.

For the diagnostic of Quasistatic diagnostic for the ideal emitter model,

ϵqs(t∞)=2GNαc3M(t∞)2,sup⁡0≤t∞≤τϵqs=2GNαc3Mmin⁡2.

Thus Mmin⁡2≥2GNα/(c3ϵ0) implies ϵqs≤ϵ0 for any ϵ0>0. The finite-interval bound in Exact quasistatic and finite-interval mass-change bounds also applies whenever its stated δ≤1/2 condition holds.

The Stefan closure is tied to the fixed reference: under ξ↦bξ, power scales as b2, while Tξ4 scales as b4 and area is unchanged. This is an exact conditional model calculation, not a Hawking-radiation theorem, a time-dependent Einstein solution, a backreaction error estimate, an observed evaporation history, or a universal generalized second law.

Facts & Assumptions

Given: The positive constants, fixed asymptotic reference, zero-mode-excluded photon/ray model, adopted effective area and mass balance, and positive cutoff of Ideal photon reservoir and active-area mass-balance model, together with the explicit ACω assumption.

[F1]

Ideal photon reservoir and active-area mass-balance model: on the selected Schwarzschild stationary family rH=2GNM/c2, AH=4πrH2, and κgeom=c2/(4GNM); it adopts T∞=ℏcκgeom/(2πkB), Aeff=ηAH, P∞=AeffσT∞4, c2M′=−P∞, and coarse entropy rate Srad′=(4/3)P∞/T∞ until Mmin⁡>0. These are model assumptions.

[F2]

Actual photon box trace and Planck energy/entropy flux: under its zero-mode-excluded two-polarization Gibbs trace and isotropic ray model, F=σT4, FS=(4/3)F/T, and σ=π2kB4/(60ℏ3c2); its trace and Fourier/Riemann arguments use ACω.

[F3]

Exact ideal emitter mass ODE and entropy accounting: for the same G,c,ℏ,kB,η,M0,Mmin⁡, fixed reference, and adopted ODE, the exact positive solution, cutoff time, energy export, and coarse entropy formula with SB(M)=4πkBGM2/(ℏc)+S0 hold.

[F4]

Quasistatic diagnostic for the ideal emitter model: tcross=rH/c and ϵqs=∣M′∣tcross/M, as internal ODE definitions only.

[F5]

Exact quasistatic and finite-interval mass-change bounds: the exact ϵqs formula, positive-cutoff upper bound, threshold criterion, and finite-interval mass-ratio bound stated above follow from the ODE.

[L1]

Conditional area entropy coefficient with free offset currently states that on the connected, strictly subextremal, zero-magnetic-flux stationary Kerr–Newman family, conditional on the reversible-heat identification and selected reduced temperature, SH=kBc3AH/(4GNℏ)+s∗. Its explicit Countable Choice premise, reversible-heat adoption and same-generator reduced-temperature identification are retained here. The current reduced-temperature Statement also explicitly carries Countable Choice. This use is only the selected stationary-family interface, not an inference of a dynamical spacetime or microscopic entropy.

[A1]

The geometric mass length for the Schwarzschild specialization is m=GNM/c2>0, a=q=0; hence it lies in the strict subextremal family. The model mass schedule is not asserted to solve the Einstein equations.

[A2]

The Axiom of Countable Choice (ACω): ACω means that every countable family of nonempty sets has a choice function. This is the exact set-theoretic hypothesis of the cited photon-spectrum chain; no full Axiom of Choice is assumed.

Proof

Given: ACω, the model assumptions of [F1], the mathematical flux relation of [F2], the exact ODE result [F3], and the conditional family interface [L1].

1.1givenF1F2A2algebra

The outgoing one-sided flux in [F2] and the adopted area/temperature in [F1] give P∞=ηAHσT∞4. Substituting AH=16πGN2M2/c4, T∞=ℏc3/(8πGNMkB), and σ=π2kB4/(60ℏ3c2) yields P∞=ηℏc6/(15360πGN2M2). The adopted balance equation is therefore M′=−αM−2 with α=ηℏc4/(15360πGN2)>0.

1.2givenF1F3A2

The hypotheses of [F3] match the fixed-reference area, temperature, outgoing flux, mass-balance law, and strictly positive cutoff in [F1]. Its exact solution gives the displayed M(t∞), τ, and energy export. No continuation to M=0 is used.

1.3givenF1F3L1A1A2algebra

Put m=GNM/c2, a=q=0. Since m>0, this point lies in the strict subextremal domain of [L1]; the selected Schwarzschild horizon area is the same AH=16πGN2M2/c4 used by [F1] and [F3]. Therefore [L1] gives SH(M)=kBc3AH(M)/(4GNℏ)+s∗, while [F3] gives SB(M)=kBc3AH(M)/(4GNℏ)+S0. Their constant offsets may differ, but subtracting the values at M0 and Mmin⁡ cancels each offset and gives SH(M0)−SH(Mmin⁡)=SB(M0)−SB(Mmin⁡)>0, because M0>Mmin⁡>0. The ACω assumption [A2] is carried for the reduced-spectrum input in [L1].

1.4F3F4F5A2algebra

The definition [F4] and ODE of [F3] give ϵqs=∣M′∣(2GNM/c3)/M=2GNα/(c3M2). Since M≥Mmin⁡, the supremum is the displayed positive-cutoff value; the threshold follows by multiplying by Mmin⁡2>0. The exact finite-interval ratio and bound are [F5]. These are internal properties of the stipulated ODE.

2.1F3step 1.3A2algebra

By [F3], Srad(τ)=(4/3)[SB(M0)−SB(Mmin⁡)]. Step 1.3 replaces this difference by ΔSH. Thus Srad(τ)=(4/3)ΔSH, and SH(Mmin⁡)+Srad(τ)−SH(M0)=−(ΔSH)+(4/3)ΔSH=(1/3)ΔSH>0. This is the stated coarse model entropy accounting only.

3.1F1algebra∎

Under the rescaling ξb=bξ, the postulate's model conventions give Eb(tb)=bE∞(t∞), tb=t∞/b, and κb=bκgeom, with b>0 and the same mass history. Define the positive emitted power in the rescaled variables by Pb:=−dEb/dtb. Differentiating the rescaled energy with respect to the rescaled time and using the stipulated balance equation dE∞/dt∞=−P∞ gives Pb=b2P∞. The temperature formula in [F1] gives Tb=ℏcκb/(2πkB)=bT∞, so the Stefan expression would instead scale as AeffσTb4=b4AeffσT∞4, with unchanged area and coefficient. Since P∞>0, these scalings agree at the fixed normalization b=1 but not for arbitrary b; the closure in [F1] is therefore not a reference-independent luminosity law.

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