5821
Semi-Riemannian metrics are uniquely determined by the smoothing of discrete functions and the nullity of the semi-Riemannian space .
 used for: smoothing of discrete functions, Semi-Riemannian metrics; conjunction: smoothing of discrete functions, nullity of the semi-Riemannian space; used for: nullity of the semi-Riemannian space, Semi-Riemannian metrics
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  smoothing of discrete functions, Semi-Riemannian metrics; smoothing of discrete functions, nullity of the semi-Riemannian space; nullity of the semi-Riemannian space, Semi-Riemannian metrics 
Answer:
 used for: smoothing of discrete functions, Semi-Riemannian metrics; conjunction: smoothing of discrete functions, nullity of the semi-Riemannian space; used for: nullity of the semi-Riemannian space, Semi-Riemannian metrics