Pierre de Fermat

I have also found a method for finding the envelopes of families of curves.

I have also found a method for finding the orthogonal trajectories of families of curves.

I have also found a method for finding the isochrones of families of curves.

I have also found a method for finding the brachistochrones of families of curves.

I have also found a method for finding the tautochrones of families of curves.

I have also found a method for finding the catenary of a uniform flexible chain.

I have also found a method for finding the cycloid.

I have also found a method for finding the epicycloid.

I have also found a method for finding the hypocycloid.

I have also found a method for finding the trochoid.

I have also found a method for finding the epitrochoid.

I have also found a method for finding the hypotrochoid.

I have also found a method for finding the spiral of Archimedes.

I have also found a method for finding the logarithmic spiral.

I have also found a method for finding the hyperbolic spiral.

I have also found a method for finding the parabolic spiral.

I have also found a method for finding the lituus.

I have also found a method for finding the cissoid of Diocles.

I have also found a method for finding the conchoid of Nicomedes.

I have also found a method for finding the quadratrix of Hippias.