Assertion: kernel | /r/HasProperty | the preimage of the singleton
Facets:
Source sentences:
text: If e H is the identity element of H, then the kernel of f is the preimage of the singleton set {e H }; that is, the subset of G consisting of all those elements of G that are mapped by f to the element e H .
text: If e B is the neutral element of B, then the kernel of f is the preimage of the singleton set {e B }; that is, the subset of A consisting of all those elements of A that are mapped by f to the element e B .