Étale spectrum
ANALOG OF THE PRIME SPECTRUM SPEC OF A COMMUTATIVE RING THAT IS OBTAINED BY REPLACING ZARISKI TOPOLOGY WITH ÉTALE TOPOLOGY
Étale Spec
In algebraic geometry, a branch of mathematics, the étale spectrum of a commutative ring or an E∞-ring, denoted by Specét or Spét, is an analog of the prime spectrum Spec of a commutative ring that is obtained by replacing Zariski topology with étale topology. The precise definition depends on one's formalism.