Full Idea
When Husserl says that sameness of number can be shown by one-one correlation, he forgets that this counting itself rests on a univocal one-one correlation, namely that between the numerals 1 to n and the objects of the set.
Clarification
'Univocal' means having only one meaning
Gist of Idea
Husserl rests sameness of number on one-one correlation, forgetting the correlation with numbers themselves
Source
Gottlob Frege (Review of Husserl's 'Phil of Arithmetic' [1894], p.326)
Book Reference
-: 'Mind July 1972' [-], p.326
A Reaction
This is the platonist talking. Neo-logicism is attempting to build numbers just from the one-one correlation of objects.