Lefschetz properties of local face modules

Local face modules are modules over face rings whose Hilbert function is the local <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>h</mml:mi> </mml:math> -vector of a triangulation of a simplex. We study when Lefschetz properties hold for local face modules. We prove new inequalities for local <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>h</mml:mi> </mml:math> -vectors of vertex-induced triangulations by proving Lefschetz properties for local face modules of these triangulations. We show that, even for regular triangulations, Lefschetz properties can fail for local face modules in positive characteristic.