Abstract
$\mathrm{KN}$ finite-energy sum rules, with phase-shift analyses as input, are evaluated to determine the $t$ dependence of the relevant Regge-exchange amplitudes. The spin nonflip contributions are similar to those deduced from high-energy Regge fits; however, the spinflip contributions of the high-energy fits are inconsistent with the sum-rule results. The implications for polarization and ${K}^{+}n$ charge exchange are discussed.
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