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Expected value or expectation of a random variable $X$ is defined, if it exists, in a mathematically precise way with respect to a probability space, typically denoted as $(\Omega, \mathcal{A}, \mathbb{P})$, where $\Omega$ is the universe of possibilities, $\mathcal{A}$ the set of possible events (which are the possible values of the random ...
Expectation Symbol in LaTeX. After looking for a builtin expectation symbol in LaTeX, and coming up with none, I’ve defined one. Just add: % Expectation symbol \DeclareMathOperator*{\E}{\mathbb{E}} to your LaTeX preamble and you’re done.
Information and discussion about LaTeX's math and science related features (e.g. formulas, graphs).
The commands introduce the following functionalities: Easily insert brackets (parentheses, absolute values, etc.) that scale automatically. Easily write functions and operators (exponential, log, expectation, probability, min, max, etc.) with brackets that scale automatically.
LaTeX allows two writing modes for mathematical expressions: the inline math mode and display math mode: inline math mode is used to write formulas that are part of a paragraph. display math mode is used to write expressions that are not part of a paragraph, and are therefore put on separate lines.
Examples: \left( \begin{array}{cc} 2\tau & 7\phi-frac5{12} \\ 3\psi & \frac{\pi}8 \end{array} \right) \left( \begin{array}{c} x \\ y \end{array} \right) \mbox{~and~} \left[ \begin{array}{cc|r} 3 & 4 & 5 \\ 1 & 3 & 729 \end{array} \right] 5 x 2τ 7φ −. 12. π y 3ψ.
All the predefined mathematical symbols from the T e X package are listed below. More symbols are available from extra packages.
Here is a list of commonly-used symbols. It is by no means exhaustive. Each symbol is described with a short phrase, and its symbol class, which determines the spacing around it, is given in parenthesis. Unless said otherwise, the commands for these symbols can be used only in math mode.
Characters in mathematical mode are usually shown in italics, but sometimes certain function names require different formatting which can be accomplished by using operators defined in LaTeX. Contents. 1 Introduction. 2 Operators in different contexts. 3 Defining your own operators. 4 Reference guide. 5 Further reading. Introduction.
What I would really like to have is a way to typeset an expectation operator “E” rather like a summation sign “Σ”, with respect to size, and with upper and lower subscripts to indicate the conditions involved.