Equation of conic, [118], [119], [120]
Euclid (ca. 300 B.C.), [6], [22], [104]
Euler (1707-1783), [166]
Fermat (1601-1665), [162], [171]
Foci of a conic, [152], [153], [154], [155], 156, [157], [158], [159], [160], [161], [162]
Fourier (1768-1830), [179]
Fourth harmonic, [29]
Fundamental form, [7], [16], [23], [36], 47, [60], [184]
Galileo (1564-1642), [162], [169], [170], 176
Gauss (1777-1855), [179]