fundamental theorem

Noun

 * 1)  A theorem (or, in non-mathematical fields, a commonly accepted hypothesis) considered to be of central importance to a specified field.

Usage notes
In usages outside mathematics proper, some fundamental theorems may still be expressed mathematically and even "proven" in the context of an accepted mathematical model.

Translations

 * Catalan: teorema fonamental
 * Dutch: hoofdstelling
 * Esperanto: fundamenta teoremo
 * French: théorème fondamental
 * German: Fundamentalsatz,
 * Italian: teorema fondamentale
 * Latin: theōrēma fundāmentāle
 * Portuguese: teorema fundamental
 * Spanish: teorema fundamental