Continous, Non-Fourier, Trigonometric Approximation of the Fractional Part Function
46504
Does there exist a smooth approximation of $x \bmod y$?
91257
Fourier basis functions
90316
Do "Parabolic Trigonometric Functions" exist?
3797
Approximate closed form of Integration involving a lot of terms
60897
Non-integer order derivative
118791
Efficient evaluation of functions defined by NIntegrate
23059
How to calculate the Fourier transform of a Gaussian function?
138074
Integrating the inverse of a function.
82027
How to derive compositions of trigonometric and inverse trigonometric functions?
155951
Harmonic series sum approximation
20025
Fourier transform of $\exp(-t^2)$ using contour integration.
156399
Chebyshev Approximation
19023
Infinite Integration by Parts
13186
Approximating cos(43) with error less than $8/60000$
92114
Approximating $\arctan x$ for large $|x|$
118715
Inverse Laplace transform of $\frac{1}{s\sinh{c\sqrt{s}}}$
74409
Differentiaion Calculus: Trig Inverse Function.