2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192202The possibility of non-causal signal propagation is examined for various theories of dense matter. This investigation requires a discussion of definitions of causality, together with interpretations of spacetime position. Specific examples are used to illustrate the satisfaction or violation of causality in realistic calculations.24 pages; 1 PostScript figure; uses revtexHigh Energy Physics - TheoryNuclear Theorytext