existence hastumandi (#), hasti (#) Fr.: existence    Math.: The fact that at least one → solution exists for a given → problem.  | 
existence problem parâse-ye hustumandi, ~ hasti Fr.: problème d'existence    Math: The question of whether a → solution to a given → problem exists.  | 
existence proof âvin-e hastumandi, ~ hasti Fr.: preuve d'existence    Math.: An → argument that establishes an → existence theorem.  | 
existence theorem farbin-e hastumandi, ~ hasti Fr.: théorème d'existence    Math: A theorem that asserts the existence of at least one object, such as the → solution to a → problem or → equation.  | 
nonexistence nâhastumandi, nâhasti Fr.: non existence    Math.: The fact that no → solution exists for a given → problem. In mathematics, nonexistence usually is a matter of impossibility.  |