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2. Propositional calculus - Wikipedia

   en.wikipedia.org/wiki/Propositional_calculus

   The propositional calculus[ a ] is a branch of logic. [ 1 ] It is also called propositional logic, [ 2 ]statement logic, [ 1 ]sentential calculus, [ 3 ]sentential logic, [ 1 ] or sometimes zeroth-order logic. [ 4 ][ 5 ] It deals with propositions [ 1 ] (which can be true or false) [ 6 ] and relations between propositions, [ 7 ] including the ...

3. Benford's law - Wikipedia

   en.wikipedia.org/wiki/Benford's_law

   Many real-world examples of Benford's law arise from multiplicative fluctuations. [25] For example, if a stock price starts at $100, and then each day it gets multiplied by a randomly chosen factor between 0.99 and 1.01, then over an extended period the probability distribution of its price satisfies Benford's law with higher and higher accuracy.

4. Exclusive or - Wikipedia

   en.wikipedia.org/wiki/Exclusive_or

   Exclusive or. Exclusive or, exclusive disjunction, exclusive alternation, logical non-equivalence, or logical inequality is a logical operator whose negation is the logical biconditional. With two inputs, XOR is true if and only if the inputs differ (one is true, one is false). With multiple inputs, XOR is true if and only if the number of true ...

5. Word order - Wikipedia

   en.wikipedia.org/wiki/Word_order

   t. e. In linguistics, word order (also known as linear order) is the order of the syntactic constituents of a language. Word order typology studies it from a cross-linguistic perspective, and examines how languages employ different orders. Correlations between orders found in different syntactic sub-domains are also of interest.

6. Set (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Set_(mathematics)

   A set of polygons in an Euler diagram This set equals the one depicted above since both have the very same elements.. In mathematics, a set is a collection of different [1] things; [2] [3] [4] these things are called elements or members of the set and are typically mathematical objects of any kind: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other ...

7. Relation (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Relation_(mathematics)

   In mathematics, a relation denotes some kind of relationship between two objects in a set, which may or may not hold. [1] As an example, " is less than " is a relation on the set of natural numbers; it holds, for instance, between the values 1 and 3 (denoted as 1 < 3), and likewise between 3 and 4 (denoted as 3 < 4), but not between the values ...