Published online by Cambridge University Press: 19 September 2018
Let $(G,\unicode[STIX]{x1D707})$ be a pair of a reductive group
$G$ over the
$p$-adic integers and a minuscule cocharacter
$\unicode[STIX]{x1D707}$ of
$G$ defined over an unramified extension. We introduce and study ‘
$(G,\unicode[STIX]{x1D707})$-displays’ which generalize Zink’s Witt vector displays. We use these to define certain Rapoport–Zink formal schemes purely group theoretically, i.e. without
$p$-divisible groups.
G.P. is partially supported by NSF grants DMS-1360733 and DMS-1701619.