Search references for LAMBDA FUNCTION. Phrases containing LAMBDA FUNCTION
See searches and references containing LAMBDA FUNCTION!LAMBDA FUNCTION
Topics referred to by the same term
Look up lambda function in Wiktionary, the free dictionary. Lambda function may refer to: Dirichlet lambda function, λ(s) = (1 – 2−s)ζ(s) where ζ is the
Lambda_function
Function definition that is not bound to an identifier
anonymous function (function literal, lambda function, or block) is a function definition that is not bound to an identifier. Anonymous functions are often
Anonymous_function
Mathematical-logic system
mathematical logic, the lambda calculus (also written as λ-calculus) is a formal system for expressing computation based on function abstraction and application
Lambda_calculus
Symmetric holomorphic function
In mathematics, the modular lambda function λ(τ) is a highly symmetric holomorphic function on the complex upper half-plane. It is invariant under the
Modular_lambda_function
Serverless computing platform
AWS Lambda is an event-driven, serverless Function as a Service (FaaS) provided by Amazon as a part of Amazon Web Services. It is designed to enable developers
AWS_Lambda
Function in mathematical number theory
3, 5, and 7. There are no primitive roots modulo 8. The Carmichael lambda function of a prime power can be expressed in terms of the Euler totient. Any
Carmichael_function
Arithmetic function
Liouville function, named after French mathematician Joseph Liouville and denoted λ ( n ) {\displaystyle \lambda (n)} , is an important arithmetic function. Its
Liouville_function
Evaluation of a function on its argument
sense, function application can be thought of as the opposite of function abstraction. It is central to programming languages derived from lambda calculus
Function_application
Type of mathematical function
{\displaystyle L(s,\chi )} and Λ ( s , χ ) {\displaystyle \Lambda (s,\chi )} are entire functions of s {\displaystyle s} . Again, this assumes that χ {\displaystyle
Dirichlet_L-function
Named function defined within a function
provide similar benefit. For example, a lambda function also allows for a function to be defined inside of a function (as well as elsewhere) and allows for
Nested_function
elliptic functions Lemniscate elliptic functions Theta functions Neville theta functions Modular lambda function Closely related are the modular forms
List of mathematical functions
List_of_mathematical_functions
Technique for creating lexically scoped first class functions
used a nested function with a name, g, while in the second case we used an anonymous nested function (using the Python keyword lambda for creating an
Closure (computer programming)
Closure_(computer_programming)
Mathematical formalism
operations on them. The definition of a lambda term is simply a variable, a lambda abstraction, or a function application, but a formal presentation can
Lambda_calculus_definition
Class of mathematical functions
homogeneous function in that: ℘ ( λ z , λ ω 1 , λ ω 2 ) = λ − 2 ℘ ( z , ω 1 , ω 2 ) . {\displaystyle \wp (\lambda z,\lambda \omega _{1},\lambda \omega _{2})=\lambda
Weierstrass_elliptic_function
anonymous function (function literal, lambda function, or block) is a function definition that is not bound to an identifier. Anonymous functions are often
Examples of anonymous functions
Examples_of_anonymous_functions
Eleventh letter in the Greek alphabet
blazon by the Spartans.[citation needed] Lambda is the von Mangoldt function in mathematical number theory. Lambda denotes the de Bruijn–Newman constant
Lambda
Higher-order function which returns some fixed point of the input function
lambda calculus and in functional programming languages, and provide a means to allow for recursive definitions. Applied to a non-constant function of
Fixed-point_combinator
Meromorphic function on the complex plane
so-called complete L-function of f {\displaystyle \textstyle f} : Λ ( f , s ) = q ( f ) s / 2 γ ( f , s ) L ( f , s ) . {\displaystyle \Lambda (f,s)=q(f)^{s/2}\gamma
L-function
Function in thermodynamics and statistical physics
{-k_{\text{B}}-\lambda _{1}}{k_{\text{B}}}}\right)Z,\end{aligned}}} where Z {\displaystyle Z} is a number defined as the canonical ensemble partition function: Z ≡
Partition function (statistical mechanics)
Partition_function_(statistical_mechanics)
Representation of data of various types in lambda calculus
types of data in the lambda calculus. In the untyped lambda calculus the only primitive data type are functions, represented by lambda abstraction terms
Church_encoding
Mathematical function having a characteristic S-shaped curve or sigmoid curve
function M11: Derivation from lambda (bell-shaped) functions M12: Integration of lambda (bell-shaped) function M13: Integration of the sum of lambda (bell-shaped)
Sigmoid_function
Equation in Fourier analysis
{\displaystyle \mathbb {R} ^{n}/\Lambda } to an L 1 ( R n / Λ ) {\displaystyle L^{1}(\mathbb {R} ^{n}/\Lambda )} function having Fourier series f Λ ( x )
Poisson_summation_formula
Colour space defined by the CIE in 1931
{K}{N}}\int _{\lambda }S(\lambda )\,I(\lambda )\,{\overline {x}}(\lambda )\,d\lambda ,\\[8mu]Y&={\frac {K}{N}}\int _{\lambda }S(\lambda )\,I(\lambda )\,{\overline
CIE_1931_color_space
Solutions of Legendre's differential equation
− x 2 ] y = 0 , {\displaystyle \left(1-x^{2}\right)y''-2xy'+\left[\lambda (\lambda +1)-{\frac {\mu ^{2}}{1-x^{2}}}\right]y=0,} where the numbers λ and
Legendre_function
Generalization of the Jack polynomial
{\displaystyle \alpha =1,P_{\lambda }} is the usual Schur function. Similar to Schur polynomials, P λ {\displaystyle P_{\lambda }} can be expressed as a sum
Jack_function
Discrete probability distribution
{\displaystyle \lambda >0} if it has a probability mass function given by: f ( k ; λ ) = Pr ( X = k ) = λ k e − λ k ! , {\displaystyle f(k;\lambda )=\Pr(X{=}k)={\frac
Poisson_distribution
Globalization meta-process
Lambda lifting is a meta-process that restructures a computer program so that functions are defined independently of each other in a global scope. An
Lambda_lifting
Mathematical functions
lemniscate sine can be used for the computation of values of the modular lambda function: ∏ k = 1 n sl ( 2 k − 1 2 n + 1 ϖ 2 ) = λ ( ( 2 n + 1 ) i ) 1 − λ (
Lemniscate_elliptic_functions
Topics referred to by the same term
Lambda expression may refer to: Lambda expression in computer programming, also called an anonymous function, is a defined function not bound to an identifier
Lambda_expression
2014 edition of the C++ programming language standard
this ability to all functions. It also extends these facilities to lambda functions, allowing return type deduction for functions that are not of the
C++14
Formalism in computer science
science, a typed lambda calculus is a typed formalism that uses the lambda symbol ( λ {\displaystyle \lambda } ) to denote anonymous function abstraction.
Typed_lambda_calculus
Formal system in mathematical logic
\to } ) that builds function types. It is the canonical and simplest example of a typed lambda calculus. The simply typed lambda calculus was originally
Simply_typed_lambda_calculus
Function that takes one or more functions as an input or that outputs a function
Functor (disambiguation). In the untyped lambda calculus, all functions are higher-order; in a typed lambda calculus, from which most functional programming
Higher-order_function
Class of periodic mathematical functions
λ ) 3 {\displaystyle \wp '(z)=-2\sum _{\lambda \in \Lambda }{\frac {1}{(z-\lambda )^{3}}}} is an odd function, i.e. ℘ ′ ( − z ) = − ℘ ′ ( z ) . {\displaystyle
Elliptic_function
Symmetric probability distribution
Tukey, the Tukey lambda distribution is a continuous, symmetric probability distribution defined in terms of its quantile function. It is typically used
Tukey_lambda_distribution
Function on an integer n which is log(p) if n equals p^k and zero otherwise
_{d\mid 12}\Lambda (d)&=\Lambda (1)+\Lambda (2)+\Lambda (3)+\Lambda (4)+\Lambda (6)+\Lambda (12)\\&=\Lambda (1)+\Lambda (2)+\Lambda (3)+\Lambda \left(2^{2}\right)+\Lambda
Von_Mangoldt_function
Method to solve constrained optimization problems
g ( x ) ⟩ {\displaystyle {\mathcal {L}}(x,\lambda )\equiv f(x)+\langle \lambda ,g(x)\rangle } for functions f , g {\displaystyle f,g} ; the notation ⟨
Lagrange_multiplier
Probability distribution
density function (pdf) of an exponential distribution is f ( x ; λ ) = { λ e − λ x x ≥ 0 , 0 x < 0. {\displaystyle f(x;\lambda )={\begin{cases}\lambda e^{-\lambda
Exponential_distribution
Continuous probability distribution
density function of a Weibull random variable is f ( x ; λ , k ) = { k λ ( x λ ) k − 1 e − ( x / λ ) k , x ≥ 0 , 0 , x < 0 , {\displaystyle f(x;\lambda
Weibull_distribution
Modular function in mathematics
\left\lbrace {\lambda ,{\frac {1}{1-\lambda }},{\frac {\lambda -1}{\lambda }},{\frac {1}{\lambda }},{\frac {\lambda }{\lambda -1}},1-\lambda }\right\rbrace
J-invariant
Typed lambda calculus
(also polymorphic lambda calculus or second-order lambda calculus) is a typed lambda calculus that introduces, to simply typed lambda calculus, a mechanism
System_F
Framework for web, mobile and IoT applications with serverless architectures
simply be a couple of lambda functions to accomplish some tasks, or an entire back-end composed of hundreds of lambda functions. Serverless supports all
Serverless_Framework
Transforming a function in such a way that it only takes a single argument
{\text{curry}}(f)=\lambda x.(\lambda y.(f(x,y)))} where λ {\displaystyle \lambda } is the abstractor of lambda calculus. Since curry takes, as input, functions with
Currying
Mathematical function with convex lower level sets
{\big \{}f(x),f(y){\big \}}\leq f(\lambda x+(1-\lambda )y)\leq \max {\big \{}f(x),f(y){\big \}}} For a quasilinear function defined on a plane, the level sets
Quasiconvex_function
General-purpose functional programming language
while !i > 0 do (acc := !acc * !i; i := !i - 1); !acc end or as a lambda function: val rec factorial = fn 0 => 1 | n => n * factorial (n - 1) Here, the
Standard_ML
Function defined by a hypergeometric series
j-invariant, a modular function, is a rational function in λ ( τ ) {\displaystyle \lambda (\tau )} . Incomplete beta functions Bx(p, q) are related by
Hypergeometric_function
Mathematical function
In mathematics, a Gaussian function, often simply referred to as a Gaussian, is a function of the base form f ( x ) = exp ( − x 2 ) {\displaystyle f(x)=\exp(-x^{2})}
Gaussian_function
Natural number
(Reduced totient function psi(n): least k such that x^k congruent to 1 (mod n) for all x prime to n; also known as the Carmichael lambda function (exponent of
34_(number)
Natural number
(Reduced totient function psi(n): least k such that x^k congruent 1 (mod n) for all x prime to n; also known as the Carmichael lambda function (exponent of
92_(number)
Number of integers coprime to and less than n
Pollack, P. (2023), "Two problems on the distribution of Carmichael's lambda function", Mathematika, 69 (4): 1195–1220, arXiv:2303.14043, doi:10.1112/mtk
Euler's_totient_function
Statistical function that defines the quantiles of a probability distribution
0 x < 0. {\displaystyle F(x;\lambda )={\begin{cases}1-e^{-\lambda x}&x\geq 0,\\0&x<0.\end{cases}}} The quantile function for Exponential(λ) is derived
Quantile_function
Matrix of second derivatives
the Lagrange function Λ ( x , λ ) = f ( x ) + λ [ g ( x ) − c ] {\displaystyle \Lambda (\mathbf {x} ,\lambda )=f(\mathbf {x} )+\lambda [g(\mathbf {x}
Hessian_matrix
Function specifying the behavior of a component in an electronic or control system
p_{L}(\lambda )=\lambda ^{n}+a_{1}\lambda ^{n-1}+\dotsb +a_{n-1}\lambda +a_{n}\,} The inhomogeneous case can be easily solved if the input function r is also
Transfer_function
Logical formalism using combinators instead of variables
lambda calculus, in which lambda expressions (representing functional abstraction) are replaced by a limited set of combinators, primitive functions without
Combinatory_logic
Mathematical constant
\Lambda } and named after Nicolaas Govert de Bruijn and Charles Michael Newman, is a mathematical constant defined via the zeros of a certain function
De_Bruijn–Newman_constant
Programming style in which control is passed explicitly
every function takes an extra argument known as its continuation, and (b) every argument in a function call must be either a variable or a lambda expression
Continuation-passing_style
Organization of information or objects into (usually self-similar) layers
With current Excel versions, LAMBDA functions can be used to create named custom functions in a formula and call the functions recursively. In structured
Nesting_(computing)
Programming construct
first-class functions that can 'close over' variables in their surrounding environment at creation time. During compilation, a transformation known as lambda lifting
Function_object
Generating function in integrable systems
{\displaystyle s_{\lambda }(\mathbf {t} )} is the Schur function corresponding to the partition λ {\displaystyle \lambda } , viewed as a function of the normalized
Tau function (integrable systems)
Tau_function_(integrable_systems)
On finding a repeating loop in a sequence
_{2}(\mu +2\lambda )\rceil } values. For example, assume the function values are 32-bit integers, so μ + λ ≤ 2 32 {\displaystyle \mu +\lambda \leq 2^{32}}
Cycle_detection
Mathematical symbol for "greater than"
operator', <=>. In ECMAScript and C#, the greater-than sign is used in lambda function expressions. In ECMAScript: const square = x => x * x; console.log(square(5));
Greater-than_sign
Program function without side effects
In computer programming, a pure function is a function that has the following properties: the function return values are identical for identical arguments
Pure_function
Mathematical functions related to Weierstrass's elliptic function
squared cosecant. The Weierstrass sigma function associated to a two-dimensional lattice Λ ⊂ C {\displaystyle \Lambda \subset \mathbb {C} } is defined to
Weierstrass_functions
Type of random mathematical object
density function λ ( x ) Λ ( W ) {\displaystyle {\frac {\lambda (x)}{\Lambda (W)}}} , accepting if it is smaller than the probability density function, and
Poisson_point_process
Function in analytic number theory
define a Dirichlet series similar to the eta function, which we will call the λ {\displaystyle \lambda } function, defined for ℜ ( s ) > 0 {\displaystyle \Re
Dirichlet_eta_function
Special function defined by an integral
^{+}} (where λ is the modular lambda function), then K(k) is expressible in closed form in terms of the gamma function. For example, r = 2, r = 3 and
Elliptic_integral
Mathematical description of quantum state
In quantum mechanics, a wave function (or wavefunction) is a mathematical description of the quantum state of an isolated quantum system. The most common
Wave_function
Family of continuous probability distributions
density function is given by f ( x ; μ , λ ) = λ 2 π x 3 exp ( − λ ( x − μ ) 2 2 μ 2 x ) {\displaystyle f(x;\mu ,\lambda )={\sqrt {\frac {\lambda }{2\pi
Inverse_Gaussian_distribution
Object that enables processing collection items in order
function to each element: from typing import Iterator digits: list[int] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] squared_digits: Iterator[int] = map(lambda x:
Iterator
Noncentral generalization of the chi-squared distribution
density function (pdf) is given by f X ( x ; k , λ ) = ∑ i = 0 ∞ e − λ / 2 ( λ / 2 ) i i ! f Y k + 2 i ( x ) , {\displaystyle f_{X}(x;k,\lambda )=\sum
Noncentral chi-squared distribution
Noncentral_chi-squared_distribution
Typographical mark (\)
characters and to introduce lambda functions (since it is a reasonable approximation in ASCII of the Greek letter lambda, λ). MS-DOS 2.0, released 1983
Backslash
Recursion without calling a function by name
functions. This is particularly important for the lambda calculus, which has anonymous unary functions, but is able to compute any recursive function
Anonymous_recursion
Relation between peak wavelengths of black body radiation and temperature
wavelength λ {\displaystyle \lambda } = 849.907 nm. These functions are radiance density functions, which are probability density functions scaled to give units
Wien's_displacement_law
Polynomial function in three variables
The function is given by a quadratic polynomial in three variables λ ( x , y , z ) ≡ x 2 + y 2 + z 2 − 2 x y − 2 y z − 2 z x . {\displaystyle \lambda (x
Källén_function
Theorem of convex functions
δ x i . {\displaystyle \mu _{n}=\sum _{i=1}^{n}\lambda _{i}\delta _{x_{i}}.} Since convex functions are continuous, and since convex combinations of
Jensen's_inequality
Family of continuous probability distributions
density function of the Erlang distribution is f ( x ; k , λ ) = λ k x k − 1 e − λ x ( k − 1 ) ! for x , λ ≥ 0 , {\displaystyle f(x;k,\lambda )={\lambda
Erlang_distribution
Artificial neural network node function
In artificial neural networks, the activation function of a node is a function that calculates the output of the node based on its individual inputs and
Activation_function
Mathematical function
we must find the unknown functions for which λ = ∫ R g 2 ( x ) d x ∫ − ∞ ∞ g 2 ( x ) d x = maximum . {\displaystyle \lambda ={\frac {\int _{R}g^{2}(\mathbf
Slepian_function
Mathematical functions which are smooth but not analytic
the scaled functions f n ( x ) = α n n ! λ n n ψ n ( λ n x ) , n ∈ N 0 , x ∈ R . {\displaystyle f_{n}(x)={\frac {\alpha _{n}}{n!\,\lambda _{n}^{n}}}\psi
Non-analytic_smooth_function
Probability distribution
probability mass function P ( X = x ) = f ( x ; λ , ν ) = λ x ( x ! ) ν 1 Z ( λ , ν ) . {\displaystyle P(X=x)=f(x;\lambda ,\nu )={\frac {\lambda ^{x}}{(x!)^{\nu
Conway–Maxwell–Poisson distribution
Conway–Maxwell–Poisson_distribution
Finnish mathematician
on multiplicative functions in short intervals, and in particular a stunning result on the parity of the Liouville lambda function on almost all short
Kaisa_Matomäki
Generalisation of the generalised hypergeometric function pFq(z)
}(z)=\sum _{n=0}^{\infty }{\frac {z^{n}}{n!\,\Gamma (\lambda n+\mu )}},\lambda >-1.} This function is used extensively in fractional calculus. Recall that
Fox–Wright_function
Association of one output to each input
in typed lambda calculus. Most kinds of typed lambda calculi can define fewer functions than untyped lambda calculus. History of the function concept List
Function_(mathematics)
n dividing λ ( m ) {\displaystyle \lambda (m)} , where λ {\displaystyle \lambda } is the Carmichael lambda function. If we require a coprime to m and only
Power_residue_symbol
Bacteriophage that infects Escherichia coli
Lambda phage, also known as λ phage, (coliphage λ, scientific name Lambdavirus lambda) is a bacterial virus, or bacteriophage, that infects the bacterial
Lambda_phage
2011 edition of the C++ programming language standard
the ability to create anonymous functions, called lambda functions. These are defined as follows: // Defines a lambda named add // Takes two ints and
C++11
Technique to make a model more generalizable and transferable
added to a loss function: min f ∑ i = 1 n V ( f ( x i ) , y i ) + λ R ( f ) {\displaystyle \min _{f}\sum _{i=1}^{n}V(f(x_{i}),y_{i})+\lambda R(f)} where V
Regularization_(mathematics)
Framework in lambda calculus
{\displaystyle \Lambda } are called polymorphic, as they can be applied to different types to get different functions, similarly to polymorphic functions in ML-like
Lambda_cube
Continuous probability distribution
F(x;\lambda ,\beta )=1-\mathrm {e} ^{\lambda \left(1-\mathrm {e} ^{x^{\beta }}\right)}} where x > 0 {\displaystyle x>0} . The quantile function of the
Chen_distribution
Category of cloud computing services
anti-pattern that can occur in serverless architectures when functions (e.g., AWS Lambda, Azure Functions) excessively invoke each other in fragmented chains,
Function_as_a_service
Fourier transform of the probability density function
f_{X}(x)={\frac {d\mu _{X}}{d\lambda }}(x).} Theorem (Lévy). If φX is characteristic function of distribution function FX, two points a < b are such that
Characteristic function (probability theory)
Characteristic_function_(probability_theory)
Concept in probability theory and statistics
theory and statistics, the moment generating function of a real-valued random variable is a generating function that provides an alternative specification
Moment_generating_function
Form of a matrix indicating its eigenvalues and their algebraic multiplicities
{red}\ulcorner }\lambda _{1}&1&{\color {red}\urcorner }\\&\lambda _{1}&1\,\,\,\,\,\\{\color {red}\llcorner }&&\lambda _{1}{\color {red}\lrcorner
Jordan_normal_form
Function that maps matrices to matrices
{f'(\lambda )}{1!}}\\0&\cdots &\cdots &0&{\frac {f(\lambda )}{0!}}\end{bmatrix}}.} This definition can be used to extend the domain of the matrix function
Analytic_function_of_a_matrix
Class of statistical survival models
consisting of two parts: the underlying baseline hazard function, often denoted λ 0 ( t ) {\displaystyle \lambda _{0}(t)} , describing how the risk of event per
Proportional_hazards_model
Function named after Harish Chandra
cs0 is Harish-Chandra's c-function: c ( λ ) = c s 0 ( λ ) . {\displaystyle c(\lambda )=c_{s_{0}}(\lambda ).} The c-functions are in general defined by
Harish-Chandra's_c-function
Mathematical function for thermoelastic strain energy density
lambda _{1}^{2}+\lambda _{2}^{2}+\lambda _{3}^{2}~;~~J=\det({\boldsymbol {F}})\\{\bar {I}}_{2}&=J^{-4/3}~I_{2}~;~~I_{2}=\lambda _{1}^{2}\lambda _{2}^{2}+\lambda
Strain energy density function
Strain_energy_density_function
Syntactic construction in computer programming
JavaScript) is a syntactic construction that appears in a position in a function call (or definition) where a comma would usually appear. The original usage
Fat_comma
Concept in mathematical optimization
_{m}\\\end{bmatrix}},\quad \mathbf {\lambda } ={\begin{bmatrix}\lambda _{1}\\\vdots \\\lambda _{j}\\\vdots \\\lambda _{\ell }\end{bmatrix}}\quad {\text{and}}\quad
Karush–Kuhn–Tucker_conditions
Class of functions behaving "like" periodic functions
zeta function, where ζ ( z + ω , Λ ) = ζ ( z , Λ ) + η ( ω , Λ ) {\displaystyle \zeta (z+\omega ,\Lambda )=\zeta (z,\Lambda )+\eta (\omega ,\Lambda )} for
Quasiperiodic_function
travel, tourism, insurance
LAMBDA FUNCTION
LAMBDA FUNCTION
Girl/Female
Muslim
Soft to touch
Female
Native American
Native American Indian name ALAMEDA means "grove of cottonwood."
Girl/Female
Muslim
Flame
Surname or Lastname
English
English : from Middle English lamb, a nickname for a meek and inoffensive person, or a metonymic occupational name for a keeper of lambs. See also Lamm.English : from a short form of the personal name Lambert.Irish : reduced Anglicized form of Gaelic Ó Luain (see Lane 3). MacLysaght comments: ‘The form Lamb(e), which results from a more than usually absurd pseudo-translation (uan ‘lamb’), is now much more numerous than O’Loan itself.’Possibly also a translation of French agneau.
Boy/Male
Indian
Jaws.
Girl/Female
Muslim
Ambitious
Girl/Female
Arabic, Indian, Muslim, Pashtun, Sanskrit
Flame; Large; Spacious; Tall; Another Name for Durga and Lakshmi
Girl/Female
Muslim
Praiseworthy, Praiser of Allah
Boy/Male
Hindu
Lord Ganesh, The huge bellied Lord
Surname or Lastname
English
English : from a pet form of Lamb 1 and 2.English : from an Old Norse personal name Lambi, from lamb ‘lamb’.
Girl/Female
Indian
Ambitious
Girl/Female
Muslim
Dark lipped
Girl/Female
Indian
Soft to touch
Female
Italian
Italian form of English Amber, AMBRA means "amber."
Girl/Female
Indian
Praiseworthy, Praiser of Allah
Girl/Female
Indian
Flame
Female
Spanish
Feminine form of Spanish Amado, AMADA means "beloved."
Girl/Female
Indian
Dark lipped
Surname or Lastname
English
English : habitational name from Lambden in Berwickshire.
Female
Greek
(Λαμία) Greek myth name of an evil spirit who abducts and devours children, LAMIA means "large shark." The name means "vampire" in Latin and "fiend" in Arabic.
LAMBDA FUNCTION
LAMBDA FUNCTION
LAMBDA FUNCTION
LAMBDA FUNCTION
LAMBDA FUNCTION
LAMBDA FUNCTION
LAMBDA FUNCTION
travel, tourism, insurance