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Function of a real variable
natural sciences, a function of a real variable is a function whose domain is the real numbers ℝ, or a subset of ℝ that contains an interval of positive length
Function of several real variables
a function of several real variables or real multivariate function is a function with more than one argument, with all arguments being real variables
Convex function
Well-known examples of convex functions of a single variable include the squaring function x 2 {\displaystyle x^{2}} and the exponential function e x {\displaystyle
Real-valued function
Real-valued functions of a real variable (commonly called real functions) and real-valued functions of several real variables are the main object of study
Real analysis
analytic function of a real variable extends naturally to a function of a complex variable. It is in this way that the exponential function, the logarithm
Real variable
Real variable may refer to: A variable taking real values, see Function of a real variable A free variable (archaic) Real versus nominal value (economics)
Complex analysis
traditionally known as the theory of functions of a complex variable, is the branch of mathematical analysis that investigates functions of complex numbers. It is
Characteristic function (probability theory)
characteristic function of any real-valued random variable completely defines its probability distribution. If a random variable admits a probability density
Function (mathematics)
the reals" may refer to a real-valued function of a real variable, and this phrase does not mean that the domain of the function is the whole set of the
Random variable
understood as a measurable function defined on a probability space that maps from the sample space to the real numbers. A random variable's possible values