theorem ngmEntryReal_linear_in_J {beta_n sigma_n J_n Fbar_n sigma_prev alpha : ℝ}
(hsp : sigma_prev ≠ 0) :
ngmEntryReal beta_n sigma_n (alpha * J_n) Fbar_n sigma_prev =
alpha * ngmEntryReal beta_n sigma_n J_n Fbar_n sigma_prev := by
simp only [ngmEntryReal]
field_simp## Entry-Exit Core Definitions (merged from EntryExitDefs.lean)