Manuscript X-D-ST@1 · X-D-ST.tex · section · e0cf8fdb

An elementary flux estimate

The shrinking layer: integrate the normal flux first › An elementary flux estimate · lines 659–668

Define the free spatial wave operators

C (t) = cos (t ∣ D ∣), S (t) = \frac{sin ( t ∣ D ∣ )}{∣ D ∣}, ∣ D ∣ = - Δ .

The sine quotient has its continuous value $t$ at zero frequency.

Displayed formulas in this passage

unlabeled · line 662
$C (t) = cos (t ∣ D ∣), S (t) = \frac{sin ( t ∣ D ∣ )}{∣ D ∣}, ∣ D ∣ = - Δ .$