Search results
Results From The WOW.Com Content Network
Usage in mathematics and computer programming. In mathematics, the equal sign can be used as a simple statement of fact in a specific case (" x = 2 "), or to create definitions (" let x = 2 "), conditional statements (" if x = 2, then ... "), or to express a universal equivalence (" (x + 1)2 = x2 + 2x + 1 ").
Double tilde: Approximation [≈] or Double negation [ ~ (~ ] This page uses orthographic and related notations. For the notations , / / and [ ] used in this article, see IPA Brackets and transcription delimiters. The tilde ( / ˈtɪld, - di, - də, - deɪ /) [1] ˜ or ~, is a grapheme with a number of uses.
In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.
A ⊂ B {\displaystyle A\subset B} may mean that A is a proper subset of B, that is the two sets are different, and every element of A belongs to B; in formula, A ≠ B ∧ ∀ x , x ∈ A ⇒ x ∈ B {\displaystyle A eq B\land \forall {}x,\,x\in A\Rightarrow x\in B} . ⊆. A ⊆ B {\displaystyle A\subseteq B}
The symbol is variously referred to as "partial", "curly d", "funky d", "rounded d", "curved d", "dabba", "number 6 mirrored", [6] or "Jacobi's delta", [5] or as "del" [7] (but this name is also used for the "nabla" symbol ∇ ). It may also be pronounced simply "dee", [8] "partial dee", [9] [10] "doh", [11] [12] or "die".
Probability density functions (pdfs) and probability mass functions are denoted by lowercase letters, e.g. , or . Cumulative distribution functions (cdfs) are denoted by uppercase letters, e.g. , or . In particular, the pdf of the standard normal distribution is denoted by , and its cdf by .
Equality between A and B is written A = B, and pronounced "A equals B ". The symbol "=" is called an "equals sign". Two objects that are not equal are said to be distinct. For example: = means that x and y denote the same object.
Squiggle operator. In formal semantics, the squiggle operator is an operator that constrains the occurrence of focus. In one common definition, the squiggle operator takes a syntactic argument and a discourse salient argument and introduces a presupposition that the ordinary semantic value of is either a subset or an element of the focus ...
A function f of x, differentiated once in Lagrange's notation. One of the most common modern notations for differentiation is named after Joseph Louis Lagrange, even though it was actually invented by Euler and just popularized by the former. In Lagrange's notation, a prime mark denotes a derivative.
Without proper rendering support, you may see question marks, boxes, or other symbols. The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic.