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Copernican System, 139.

Copernicus, 56, 139.

Correspondence, principle of, 293, 297.

Cosine, 165.

Coss, term for algebra, 152.

Cotangent, 141, 165.

Cotes, 242; ref. to, 243.

Coulomb, 394.

Cournot, 340.

Cousinery, 299.

Covariants, 327, 354, 369.

Cox, 306.

Craig, 306, 347, 355, 382.

Craige, 226.

Cramer, 217.

Crelle, 348; ref. to, 349.

Crelle's Journal, 295.

Cremona, 299; ref. to, 291, 294–296, 300, 313.

Cridhara, 87.

Criteria of convergence, 334–339.

Crofton, 341.

Crozet, 288.

Ctesibius, 52.

Cube, duplication of. See Duplication of the cube.

Cube numbers, 72, 111, 180.

Cubic curves, 217, 257, 297.

Cubic equations, 112, 113, 142–145, 149, 152, 153. See Algebra.

Cubic residues, 366.

Culmann, 299, 300.

Curtze, M., 299.

Curvature, measure of, 314.

Curve of swiftest descent, 234, 238.

Curves, osculating, 226; quadrature of, 42, 49, 177, 190, 193, 202, 220; theory of, 226, 240, 242, 243, 292, 321. See Cubic curves, Rectification, Geometry, Conic sections.

Cusanus, 154.

Cyclic method, 96, 97.

Cycloid, 171, 173, 176, 187, 190, 191, 225, 234, 240.

Cyzicenus, 33.

Czuber, 340.

 

D'Alembert, 254–256; ref. to, 254, 258, 262, 265, 268–270, 386.

D'Alembert's principle, 254.

Damascius, 61; ref. to, 38, 104.

Darboux, XIII., 313, 343, 346, 361, 362.

Darwin, 376; ref. to, 384, 391.

Data (Euclid's), 39.

Davis, E. W., 306.

Davis, W. M., 385.

De Baune, 189; ref. to, 185, 223, 225.

Dee, 138.

Decimal fractions, 159–161.

Decimal point, 161.

Dedekind, 371; ref. to, 357, 362, 372.

Deficiency of curves, 312.

Definite integrals, 169, 334, 339, 341, 351, 362.

Deinostratus. See Dinostratus.

De Lahire, 285, 290.

Delambre, 366.

Delaunay, 376; ref. to, 333, 334.

Delian problem. See Duplication of the cube.

Del Pezzo, 305.

Democritus, 28; ref. to, 16.

De Moivre, 240.

De Morgan, 316; ref. to, X., XI., 1, 2, 70, 96, 161, 205, 229, 233, 260, 277, 285, 291, 333, 337, 340, 366.

De Paolis, 306.

Derivatives, method of, 269.

Desargues, 177; ref. to, 174, 184, 240, 285, 290.

Desboves, 379.

Descartes, 183–189; ref. to, 4, 48, 60, 113, 167, 173, 174, 189, 191, 192, 216, 220, 223, 240, 317; rule of signs, 187, 193.

Descriptive geometry, 286–288, 300.

Determinants, 226, 265, 278, 313, 324, 325, 334, 363.

Devanagari-numerals, 103.

Dialytic method of elimination, 330.

Differences, finite. See Finite differences.

Differential calculus, 200, 221–227, 236–242 (see Bernoullis, Euler, Lagrange, Laplace, etc.); controversy between Newton and Leibniz, 227–233; alleged invention by Pascal, 174; philosophy of, 236, 256, 259, 268, 289. 333.

Differential equations, 239, 252, 265, 278, 314, 318, 321, 333, 341–347.

Differential invariants, 327.