Mathematics

1. Approximation of Function 6%
2. Asymptotic Behavior 10%
3. Asymptotic Formula 6%
4. Asymptotics 98%
5. Coincides 7%
6. Constant 11%
7. Discontinuous Functions 13%
8. Essential Spectrum 18%
9. Explicit Formula 14%
10. Hankel Matrix 10%
11. Hankel Operator 93%
12. Hardy Space 7%
13. Integral 9%
14. Integral Operator 13%
15. Inverse Spectral Problem 6%
16. Jacobi Matrix 6%
17. Laplace Operator 6%
18. Leading Term 15%
19. Limit Theorem 6%
20. Matrix 98%
21. Measures 7%
22. Moment Problem 6%
23. Multiplicative 18%
24. Nonnegativity 6%
25. Number 6%
26. Operators 100%
27. PDE 6%
28. Piecewise 7%
29. Piecewise Continuous Function 9%
30. Points 12%
31. Rational Approximation 6%
32. Rational Function 6%
33. Real Line 13%
34. Restriction Map 6%
35. Self-Adjoint 33%
36. Self-Adjoint Operator 42%
37. Sequences 13%
38. Sharp Estimate 6%
39. Singular Value 25%
40. Spectral Density 32%
41. Spectral Projection 29%
42. Spectral Shift Function 18%
43. Spectral Theory 34%
44. Subspace 6%
45. Theoretic Method 6%
46. Toeplitz Operator 19%
47. Trace Formula 6%
48. Unit Circle 13%
49. Variables 19%
50. Zeros 7%