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We consider numerical data for the lattice Landau gluon propagator obtainedat very large lattice volumes in three-dimensional pure SU(2) Yang-Mills gaugetheory (YM^2_3). We find that the temporal correlator C(t) shows an oscillatorypattern and is negative for several values of t. This is an explicit violationof reflection positivity and can be related to gluon confinement. We alsoobtain a good fit for this quantity in the whole time interval using a sum ofStingl-like propagators.Comment: 3 pages, 1 figure, 1 table, presented by A.R. Taurines at the IX  Hadron Physics and VII Relativistic Aspects of Nuclear Physics Workshops,  Angra dos Reis, Rio de Janeiro, Brazil (March 28--April 3, 2004

Temporal correlator in YM[sub 3][sup 2] and reflection-positivity violation