What is "etale"

In mathematics, more specifically in algebra, the adjective étale refers to several closely related concepts:

• Étale morphism
  • Formally étale morphism
• Étale cohomology
• Étale topology
• Étale fundamental group
• Étale group scheme
• Étale algebra

Other:

• Étale is a mountain of Savoie and Haute-Savoie in France.

Étale is a mountain of Savoie and Haute-Savoie, France. It lies in the Aravis Range of the French Prealps and has an elevation of 2,484 metres above sea level.