Manuscript Em02-E@1 · Em02-E-v1.tex · section · f3795050

The instantaneous kernel has off-diagonal wavefront

Noncompact support and instantaneous singularities › The instantaneous kernel has off-diagonal wavefront · lines 1137–1148

Em02-E@1#eq:instantaneous

The background spatial inverse, considered as a spacetime kernel with coordinate-volume pairing, is

G_{0} (t, x; u, y) = - \frac{a ( t ) ^{2}}{4 π} \frac{δ ( t - u )}{∣ x - y ∣} .

Displayed formulas in this passage

Em02-E@1#eq:instantaneous · line 1141
$G_{0} (t, x; u, y) = - \frac{a ( t ) ^{2}}{4 π} \frac{δ ( t - u )}{∣ x - y ∣} .$