Bolzano and Husserl on analytic philosophy

The author tries to outline Bolzano's proposal to define the concept of an analytic proposition by using the concept of idea variation. He discusses t he problems that arise for Bolzano's attempt to define the concept of a log ical truth on the same lines. He ends by comparing Bolzano's and Husserl's definition of the concept of an analytical proposition: Husserl's definitio n can be seen as an original application of Bolzano's basic idea to define basic logical notions with recourse to the concept of idea variation.