  Event-by-event multiplicity fluctuations in nucleus-nucleus collisions are
studied within the relativistic transport models: EPOS, PHSD, and UrQMD. As
measures of particle number fluctuations we consider the scaled variances
$\omega[X]$ for positive, negative, and all charged hadrons, and the strongly
intensive quantities $\Delta[K^+,\pi^+],$ $\Sigma[K^+,\pi^+]$ for $K^+$ and
$\pi^+$ yields. At the SPS energy range the fluctuation measures are calculated
for proton-proton, Ar+Sc, and Pb+Pb collisions. Comparison with recent
NA61/SHINE and older NA49 measurements of the multiplicity fluctuations is
done. A validity of the model of independent sources, a role of the
experimental acceptance, and the centrality selection procedure are
studied.Event-by-event multiplicity fluctuations in nucleus-nucleus collisions
are studied within the relativistic transport models: EPOS, PHSD, and UrQMD. As
measures of particle number fluctuations we consider the scaled variances
$\omega[X]$ for positive, negative, and all charged hadrons, and the strongly
intensive quantities $\Delta[K^+,\pi^+],$ $\Sigma[K^+,\pi^+]$ for $K^+$ and
$\pi^+$ yields. At the SPS energy range the fluctuation measures are calculated
for proton-proton, Ar+Sc, and Pb+Pb collisions. Comparison with recent
NA61/SHINE and older NA49 measurements of the multiplicity fluctuations is
done. A validity of the model of independent sources, a role of the
experimental acceptance, and the centrality selection procedure are studied.
