In modern Fourier analysis, theorems are usually less important than the techniques developed to prove them. Calderón's techniques have been absorbed as standard tools of harmonic analysis and are now propagating into nonlinear analysis, partial differential equations, complex analysis, and even signal processing and numerical analysis.
Sa makabagong Fourier analysis, theorems ay karaniwang hindi gaanong mahalaga kaysa sa mga pamamaraan na binuo upang patunayan ang mga ito. Calderón ng pamamaraan ay na-buyo bilang standard tools ng maharmonya analysis at ngayon ay propagating sa nonlinear analysis, bahagyang kaugalian equation, komplikadong pagtatasa, at kahit signal processing at de-numerong analysis.