This site—

                         ↑Reference

                  Glossary
                          On Flags, Numbers and Continuity
                          On Infinity                  
                          On Measurement
                          On Metrics
                          On the Algebra of Measurement
                                           Perspective Measure
                                           Exponential Measure
                                                 Growth Measure
                                                         Cross Ratio

                          On Geometric Degeneracy
                          On Duality and Polarity
                          On Involution and Conjugacy  
                          On Real and Imaginary

                          On Cones
                          On Conics(1)    
                          On Conics(2)
                          On Conics(3)

                         On Path Curves (1)
                         On Path Curves (2)
                         On Path Curves (3)
                         On Path Curves (4)

               Filtration
               On Tuned Filtration
               The Math of Band Pass Filtration

               The Bud Workshop Program
               Articles
               Musings

                Downloadable Word Documents
                    Practical Path Curve Calculations by N.C. Thomas
                    Practical Bud Observation                by G. Calderwood
                    Practical Bud Measurement              by G. Calderwood  
                    Band Pass by Fourier Methods         by G. Calderwood