# modular form

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## 11—18 of 18 matching pages

##### 11: 23.20 Mathematical Applications
For conformal mappings via modular functions see Apostol (1990, §2.7). …
##### 12: Bibliography R
• R. Roy (2017) Elliptic and modular functions from Gauss to Dedekind to Hecke. Cambridge University Press, Cambridge.
• J. Rushchitsky and S. Rushchitska (2000) On Simple Waves with Profiles in the form of some Special Functions—Chebyshev-Hermite, Mathieu, Whittaker—in Two-phase Media. In Differential Operators and Related Topics, Vol. I (Odessa, 1997), Operator Theory: Advances and Applications, Vol. 117, pp. 313–322.
• ##### 13: Mathematical Introduction
Other examples are: (a) the notation for the Ferrers functions—also known as associated Legendre functions on the cut—for which existing notations can easily be confused with those for other associated Legendre functions (§14.1); (b) the spherical Bessel functions for which existing notations are unsymmetric and inelegant (§§10.47(i) and 10.47(ii)); and (c) elliptic integrals for which both Legendre’s forms and the more recent symmetric forms are treated fully (Chapter 19). …
 $(a,b]$ or $[a,b)$ half-closed intervals. … $m\equiv n\pmod{p}$ means $p$ divides $m-n$, where $m$, $n$, and $p$ are positive integers with $m>n$. …
For equations or other technical information that appeared previously in AMS 55, the DLMF usually includes the corresponding AMS 55 equation number, or other form of reference, together with corrections, if needed. …
##### 14: 27.11 Asymptotic Formulas: Partial Sums
It is more fruitful to study partial sums and seek asymptotic formulas of the form
27.11.9 $\sum_{\begin{subarray}{c}p\leq x\\ p\equiv h\!\!\!\!\!\pmod{k}\end{subarray}}\frac{1}{p}=\frac{1}{\phi\left(k% \right)}\ln\ln x+B+O\left(\frac{1}{\ln x}\right),$
27.11.11 $\sum_{\begin{subarray}{c}p\leq x\\ p\equiv h\!\!\!\!\!\pmod{k}\end{subarray}}\frac{\ln p}{p}=\frac{1}{\phi\left(k% \right)}\ln x+O\left(1\right),$
Letting $x\to\infty$ in (27.11.9) or in (27.11.11) we see that there are infinitely many primes $p\equiv h\pmod{k}$ if $h,k$ are coprime; this is Dirichlet’s theorem on primes in arithmetic progressions. … The prime number theorem for arithmetic progressions—an extension of (27.2.3) and first proved in de la Vallée Poussin (1896a, b)—states that if $\left(h,k\right)=1$, then the number of primes $p\leq x$ with $p\equiv h\pmod{k}$ is asymptotic to $x/(\phi\left(k\right)\ln x)$ as $x\to\infty$.
##### 15: 27.2 Functions
An equivalent form states that the $n$th prime $p_{n}$ (when the primes are listed in increasing order) is asymptotic to $n\ln n$ as $n\to\infty$: … and if $\phi\left(n\right)$ is the smallest positive integer $f$ such that $a^{f}\equiv 1\pmod{n}$, then $a$ is a primitive root mod $n$. …
##### 16: Software Index
Open Source With Book Commercial
23 Weierstrass Elliptic and Modular Functions
• Open Source Collections and Systems.

These are collections of software (e.g. libraries) or interactive systems of a somewhat broad scope. Contents may be adapted from research software or may be contributed by project participants who donate their services to the project. The software is made freely available to the public, typically in source code form. While formal support of the collection may not be provided by its developers, within active projects there is often a core group who donate time to consider bug reports and make updates to the collection.

• ##### 17: 27.14 Unrestricted Partitions
###### §27.14(iv) Relation to Modular Functions
Dedekind sums occur in the transformation theory of the Dedekind modular function $\eta\left(\tau\right)$, defined by … For further properties of the function $\eta\left(\tau\right)$ see §§23.1523.19. … implies $p\left(5n+4\right)\equiv 0\pmod{5}$. …For example, $p\left(1575\;25693n+1\;11247\right)\equiv 0\pmod{13}$. …
##### 18: Bibliography
• G. D. Anderson, S.-L. Qiu, M. K. Vamanamurthy, and M. Vuorinen (2000) Generalized elliptic integrals and modular equations. Pacific J. Math. 192 (1), pp. 1–37.
• T. M. Apostol (1990) Modular Functions and Dirichlet Series in Number Theory. 2nd edition, Graduate Texts in Mathematics, Vol. 41, Springer-Verlag, New York.
• V. I. Arnol’d (1974) Normal forms of functions in the neighborhood of degenerate critical points. Uspehi Mat. Nauk 29 (2(176)), pp. 11–49 (Russian).
• V. I. Arnol’d (1975) Critical points of smooth functions, and their normal forms. Uspehi Mat. Nauk 30 (5(185)), pp. 3–65 (Russian).
• R. Askey (1982) Commentary on the Paper “Beiträge zur Theorie der Toeplitzschen Form. In Gábor Szegő, Collected Papers. Vol. 1, Contemporary Mathematicians, pp. 303–305.