---
name: "std::tr1"
section: "3cxx"
platform: "linux"
package: "libstdc++-12-doc"
version: "12.4.0-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/std::tr1/3cxx"
---

# std::tr1(3cxx)

ISO C++ TR1 entities toplevel namespace is std::tr1.

## NAME

std::tr1 - ISO C++ TR1 entities toplevel namespace is std::tr1.

## SYNOPSIS

### Namespaces

namespace **\_\_detail**\
 Implementation details not part of the namespace std::tr1 interface.

### Functions

template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **assoc\_laguerre** (unsigned int \_\_n, unsigned int **\_\_m**, \_Tp \_\_x)\
 5\.2.1.1 Associated Laguerre polynomials.  float **assoc\_laguerref** (unsigned int \_\_n, unsigned int **\_\_m**, float \_\_x)\
 long double **assoc\_laguerrel** (unsigned int \_\_n, unsigned int **\_\_m**, long double \_\_x)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **assoc\_legendre** (unsigned int **\_\_l**, unsigned int **\_\_m**, \_Tp \_\_x)\
 5\.2.1.2 Associated Legendre functions.  float **assoc\_legendref** (unsigned int **\_\_l**, unsigned int **\_\_m**, float \_\_x)\
 long double **assoc\_legendrel** (unsigned int **\_\_l**, unsigned int **\_\_m**, long double \_\_x)\
 template\<**typename** **\_Tpx** , **typename** **\_Tpy** \> \_\_gnu\_cxx::\_\_promote\_2\< **\_Tpx**, **\_Tpy** \>::\_\_type **beta** (**\_Tpx** \_\_x, **\_Tpy** \_\_y)\
 5\.2.1.3 Beta functions.  float **betaf** (float \_\_x, float \_\_y)\
 long double **betal** (long double \_\_x, long double \_\_y)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **comp\_ellint\_1** (\_Tp **\_\_k**)\
 5\.2.1.4 Complete elliptic integrals of the first kind.  float **comp\_ellint\_1f** (float **\_\_k**)\
 long double **comp\_ellint\_1l** (long double **\_\_k**)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **comp\_ellint\_2** (\_Tp **\_\_k**)\
 5\.2.1.5 Complete elliptic integrals of the second kind.  float **comp\_ellint\_2f** (float **\_\_k**)\
 long double **comp\_ellint\_2l** (long double **\_\_k**)\
 template\<**typename** \_Tp , **typename** **\_Tpn** \> \_\_gnu\_cxx::\_\_promote\_2\< \_Tp, **\_Tpn** \>::\_\_type **comp\_ellint\_3** (\_Tp **\_\_k**, **\_Tpn** **\_\_nu**)\
 5\.2.1.6 Complete elliptic integrals of the third kind.  float **comp\_ellint\_3f** (float **\_\_k**, float **\_\_nu**)\
 long double **comp\_ellint\_3l** (long double **\_\_k**, long double **\_\_nu**)\
 template\<**typename** **\_Tpa** , **typename** **\_Tpc** , **typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\_3\< **\_Tpa**, **\_Tpc**, \_Tp \>::\_\_type **conf\_hyperg** (**\_Tpa** \_\_a, **\_Tpc** \_\_c, \_Tp \_\_x)\
 5\.2.1.7 Confluent hypergeometric functions.  float **conf\_hypergf** (float \_\_a, float \_\_c, float \_\_x)\
 long double **conf\_hypergl** (long double \_\_a, long double \_\_c, long double \_\_x)\
 template\<**typename** \_Tp \> **std::complex**\< **typename** \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type \> **conj** (\_Tp \_\_x)\
 template\<**typename** \_Tp \> **std::complex**\< \_Tp \> **conj** (const **std::complex**\< \_Tp \> &**\_\_z**)\
 template\<**typename** **\_Tpnu** , **typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\_2\< **\_Tpnu**, \_Tp \>::\_\_type **cyl\_bessel\_i** (**\_Tpnu** **\_\_nu**, \_Tp \_\_x)\
 5\.2.1.8 Regular modified cylindrical Bessel functions.  float **cyl\_bessel\_if** (float **\_\_nu**, float \_\_x)\
 long double **cyl\_bessel\_il** (long double **\_\_nu**, long double \_\_x)\
 template\<**typename** **\_Tpnu** , **typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\_2\< **\_Tpnu**, \_Tp \>::\_\_type **cyl\_bessel\_j** (**\_Tpnu** **\_\_nu**, \_Tp \_\_x)\
 5\.2.1.9 Cylindrical Bessel functions (of the first kind).  float **cyl\_bessel\_jf** (float **\_\_nu**, float \_\_x)\
 long double **cyl\_bessel\_jl** (long double **\_\_nu**, long double \_\_x)\
 template\<**typename** **\_Tpnu** , **typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\_2\< **\_Tpnu**, \_Tp \>::\_\_type **cyl\_bessel\_k** (**\_Tpnu** **\_\_nu**, \_Tp \_\_x)\
 5\.2.1.10 Irregular modified cylindrical Bessel functions.  float **cyl\_bessel\_kf** (float **\_\_nu**, float \_\_x)\
 long double **cyl\_bessel\_kl** (long double **\_\_nu**, long double \_\_x)\
 template\<**typename** **\_Tpnu** , **typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\_2\< **\_Tpnu**, \_Tp \>::\_\_type **cyl\_neumann** (**\_Tpnu** **\_\_nu**, \_Tp \_\_x)\
 5\.2.1.11 Cylindrical Neumann functions.  float **cyl\_neumannf** (float **\_\_nu**, float \_\_x)\
 long double **cyl\_neumannl** (long double **\_\_nu**, long double \_\_x)\
 template\<**typename** \_Tp , **typename** **\_Tpp** \> \_\_gnu\_cxx::\_\_promote\_2\< \_Tp, **\_Tpp** \>::\_\_type **ellint\_1** (\_Tp **\_\_k**, **\_Tpp** \_\_phi)\
 5\.2.1.12 Incomplete elliptic integrals of the first kind.  float **ellint\_1f** (float **\_\_k**, float \_\_phi)\
 long double **ellint\_1l** (long double **\_\_k**, long double \_\_phi)\
 template\<**typename** \_Tp , **typename** **\_Tpp** \> \_\_gnu\_cxx::\_\_promote\_2\< \_Tp, **\_Tpp** \>::\_\_type **ellint\_2** (\_Tp **\_\_k**, **\_Tpp** \_\_phi)\
 5\.2.1.13 Incomplete elliptic integrals of the second kind.  float **ellint\_2f** (float **\_\_k**, float \_\_phi)\
 long double **ellint\_2l** (long double **\_\_k**, long double \_\_phi)\
 template\<**typename** \_Tp , **typename** **\_Tpn** , **typename** **\_Tpp** \> \_\_gnu\_cxx::\_\_promote\_3\< \_Tp, **\_Tpn**, **\_Tpp** \>::\_\_type **ellint\_3** (\_Tp **\_\_k**, **\_Tpn** **\_\_nu**, **\_Tpp** \_\_phi)\
 5\.2.1.14 Incomplete elliptic integrals of the third kind.  float **ellint\_3f** (float **\_\_k**, float **\_\_nu**, float \_\_phi)\
 long double **ellint\_3l** (long double **\_\_k**, long double **\_\_nu**, long double \_\_phi)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **expint** (\_Tp \_\_x)\
 5\.2.1.15 Exponential integrals.  float **expintf** (float \_\_x)\
 long double **expintl** (long double \_\_x)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **fabs** (\_Tp \_\_x)\
 template\<**typename** \_Tp \> **std::complex**\< \_Tp \> **fabs** (const **std::complex**\< \_Tp \> &**\_\_z**)\
 fabs(\_\_z) \[8.1.8\].  float **fabs** (float \_\_x)\
 long double **fabs** (long double \_\_x)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **hermite** (unsigned int \_\_n, \_Tp \_\_x)\
 5\.2.1.16 Hermite polynomials.  float **hermitef** (unsigned int \_\_n, float \_\_x)\
 long double **hermitel** (unsigned int \_\_n, long double \_\_x)\
 template\<**typename** **\_Tpa** , **typename** **\_Tpb** , **typename** **\_Tpc** , **typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\_4\< **\_Tpa**, **\_Tpb**, **\_Tpc**, \_Tp \>::\_\_type **hyperg** (**\_Tpa** \_\_a, **\_Tpb** \_\_b, **\_Tpc** \_\_c, \_Tp \_\_x)\
 5\.2.1.17 Hypergeometric functions.  float **hypergf** (float \_\_a, float \_\_b, float \_\_c, float \_\_x)\
 long double **hypergl** (long double \_\_a, long double \_\_b, long double \_\_c, long double \_\_x)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **laguerre** (unsigned int \_\_n, \_Tp \_\_x)\
 5\.2.1.18 Laguerre polynomials.  float **laguerref** (unsigned int \_\_n, float \_\_x)\
 long double **laguerrel** (unsigned int \_\_n, long double \_\_x)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **legendre** (unsigned int \_\_n, \_Tp \_\_x)\
 5\.2.1.19 Legendre polynomials.  float **legendref** (unsigned int \_\_n, float \_\_x)\
 long double **legendrel** (unsigned int \_\_n, long double \_\_x)\
 template\<**typename** \_Tp , **typename** \_Up \> **std::complex**\< **typename** \_\_gnu\_cxx::\_\_promote\_2\< \_Tp, \_Up \>::\_\_type \> **polar** (const \_Tp &**\_\_rho**, const \_Up &**\_\_theta**)\
 template\<**typename** \_Tp , **typename** \_Up \> \_\_gnu\_cxx::\_\_promote\_2\< \_Tp, \_Up \>::\_\_type **pow** (\_Tp \_\_x, \_Up \_\_y)\
 template\<**typename** \_Tp \> **std::complex**\< \_Tp \> **pow** (const \_Tp &\_\_x, const **std::complex**\< \_Tp \> &\_\_y)\
 template\<**typename** \_Tp , **typename** \_Up \> **std::complex**\< **typename** \_\_gnu\_cxx::\_\_promote\_2\< \_Tp, \_Up \>::\_\_type \> **pow** (const \_Tp &\_\_x, const **std::complex**\< \_Up \> &\_\_y)\
 template\<**typename** \_Tp \> **std::complex**\< \_Tp \> **pow** (const **std::complex**\< \_Tp \> &\_\_x, const \_Tp &\_\_y)\
 template\<**typename** \_Tp , **typename** \_Up \> **std::complex**\< **typename** \_\_gnu\_cxx::\_\_promote\_2\< \_Tp, \_Up \>::\_\_type \> **pow** (const **std::complex**\< \_Tp \> &\_\_x, const \_Up &\_\_y)\
 Additional overloads \[8.1.9\].  template\<**typename** \_Tp \> **std::complex**\< \_Tp \> **pow** (const **std::complex**\< \_Tp \> &\_\_x, const **std::complex**\< \_Tp \> &\_\_y)\
 template\<**typename** \_Tp , **typename** \_Up \> **std::complex**\< **typename** \_\_gnu\_cxx::\_\_promote\_2\< \_Tp, \_Up \>::\_\_type \> **pow** (const **std::complex**\< \_Tp \> &\_\_x, const **std::complex**\< \_Up \> &\_\_y)\
 float **pow** (float \_\_x, float \_\_y)\
 long double **pow** (long double \_\_x, long double \_\_y)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **riemann\_zeta** (\_Tp \_\_x)\
 5\.2.1.20 Riemann zeta function.  float **riemann\_zetaf** (float \_\_x)\
 long double **riemann\_zetal** (long double \_\_x)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **sph\_bessel** (unsigned int \_\_n, \_Tp \_\_x)\
 5\.2.1.21 Spherical Bessel functions.  float **sph\_besself** (unsigned int \_\_n, float \_\_x)\
 long double **sph\_bessell** (unsigned int \_\_n, long double \_\_x)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **sph\_legendre** (unsigned int **\_\_l**, unsigned int **\_\_m**, \_Tp **\_\_theta**)\
 5\.2.1.22 Spherical associated Legendre functions.  float **sph\_legendref** (unsigned int **\_\_l**, unsigned int **\_\_m**, float **\_\_theta**)\
 long double **sph\_legendrel** (unsigned int **\_\_l**, unsigned int **\_\_m**, long double **\_\_theta**)\
 template\<**typename** \_Tp \> \_\_gnu\_cxx::\_\_promote\< \_Tp \>::\_\_type **sph\_neumann** (unsigned int \_\_n, \_Tp \_\_x)\
 5\.2.1.23 Spherical Neumann functions.  float **sph\_neumannf** (unsigned int \_\_n, float \_\_x)\
 long double **sph\_neumannl** (unsigned int \_\_n, long double \_\_x)\

## Detailed Description

ISO C++ TR1 entities toplevel namespace is std::tr1.

## Author

Generated automatically by Doxygen for libstdc++ from the source code.