Functional and Linear Functional may I know what is the distinction between functional analysis and linear functional analysis? I do a search online and came to a conclusion that linear functional analysis is not functional analysis and am getting confused by them. When I look at the book Linear Functional Analysis published by Joan Cerda by AMS, there is not much difference in its content compared to other titles with just the heading Functional Analysis. Hope someone can clarify for me. Thank You.

They probably mean the same thing. It's a matter of emphasis. Cerda may be trying to distinguish ordinary functional analysis from nonlinear functional analysis, where nonlinear maps are studied. 
Bollobás does something similar; his book on functional analysis is entitled Linear Analysis and I think this is again to emphasize the linear nature of the subject. 
