(The numbers refer to the paragraphs)
Abel (1802-1829), [179]
Analogy, [24]
Analytic geometry, [21], [118], [119], 120, [146], [176], [180]
Anharmonic ratio, [46], [161], [184], [185]
Apollonius (second half of third century B.C.), [70]
Archimedes (287-212 B.C.), [176]
Aristotle (384-322 B.C.), [169]
Asymptotes, [111], [113], [114], [115], 116, [117], [118], [148]
Axes of a conic, [148]