19 



Congruences linear . . . . 2810 



other than linear . , . . 2850 



Conies, Geometry of . . 7200-7230 



Systems of . . . . 7230, 8070 



Gonnexes 8080 



Contact transformations of 



ditferential forms . . . . 5230 



Continued fractions .. .. 2815 



Continuous groups of finite 



order .. .. 1230,5240 



of infinite order 1230, 5240 



Co-ordinates, curvilinear .. 8450 



Correspondence, Principle of . . 8030 

 Covariants, see Forms. 

 Cubic equations .. .. .. 2430 



residues . . . . . . 2850 



Curvature of plane curves . . 8430 



of skew curves . . . . 8440 



of surfaces . . 8810, 8450, 8830 



Curves, Applications of differen- 

 tial calculus to . . 8430, 8440 



algebraic . . . . 7200-8100 



Genus of .. .. 8030 



Groups of points on. . 8030 



plane, Conic sections of 7200-7230 



of degree higher than 



the second . . 7600-7630 



Quadrature of . . . . 8460 



Rectification of . • . . 8460 



Systems of 8090 



transcendental . . . . 8470 



and surfaces, Systems of .. 8090 



on surfaces . . . . 8040, 8810 



Curvilinear co-ordinates. . . . 8450 



Cydotomy 2880 



Definite integrals . . . . 3260 



Functions defined 



by 4410-4440 



in integration of 



equations of physics . . 5650 



of ordinary 



linear equations . . 4430, 4860 

 Deformation of surfaces. . . . 8850 



Descriptive geometry . . . . 6840 



Determinants . . . . . . 2010 



Dictionaries 0030 



Differences, Calculus of . . .. 1640 



Difference equations . . 6000-6020 

 Ditferential calculus .. ., 3230 



Analytical applications 



of 3240 



Applications to curves 



8430, 8440 



Applications to geo- 

 metry 8400 



.Applications to sur- 

 faces 8450 



equations . . 4450, 4800-5660 



Applications to geo- 

 metry .. .. 8800-8870 



(a-7506) 



Differential equations of mathe- 

 matical physics . . 5630-5660 



forms .. .. 5200-5240 



geometry 8800 



of congruences . . 8451 



invariants . . 1230, 1240, 5240 



Dirichlet's problem . . . . 5660 



Discrete groups of finite order 



1210, 2450 



of infinite order 1210, 4440 



Discriminants . . . . . • 2020 



Distributions 1620 



Distribution of prime numbers. . 2900 

 Divisibility of algebraic quantities 1610 



of numbers . . . . . • 2810 



Division in transformation of 



elliptic functions . . . . 4050 



Duality 8010 



Dynamics,|theoretical, Differential 



equations of .. .. .. 4830 



Elements of hyperspace. . 8490, 8870 



of space . . . . . . 8080 



Elliptic functions 4040, 4050, 4440, 8050 

 Enumerative geometry 8070, 7230, 7260 

 Equations, algebraic . . 2400-2460 

 cubic 2430 



indeterminate . . . . 2815 



linear 2460 



quartic 2430 



simultaneous . . . . 2460 



special . . . . . . 2430 



transcendental . . . . 2470 



Errors, Theory of . . . . 1630 



Eulerian functions . . . . 4410 



Existence of irrational numbers 0420 



of roots of equations . . 2410 



of transcendental numbers 0420 



theorems for solution of 



difierential equations . . . . 4810 



Expansion in series of functions 



3630, 5610, 5620 



of powers 3220, 3240 



Exponential functions . . . . 4030 



Finite differences. Equations of 6020 



summation.. .. .. 1625 



First order, Ordinary non-linear 



equations of . . . . 4870 



Partial differential 



equations of . . . . 4830 



Forms, binary . . . . 2050, 2830 



differenti .. .. 5200-5240 



in more than three variables 



2070, 2340 



of higher degree, numerical 



2860, 2870 



ternary , . . . 2060, 2840 



Foundations of arithmetic 0400-0430 

 Fourier's series . . . . . . 5610 



Fractions, continued .. .. 2815 



rational . . . . . . 2410 



c 2 



