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G. H. Hardy, A Mathematician's Apology (1940) He [Russell] said once, after some contact with the Chinese language, that he was horrified to find that the language of Principia Mathematica was an Indo-European one. John Edensor Littlewood, Littlewood's Miscellany (1986) The Principia Mathematica (often abbreviated PM) is a three-volume work on the foundations of mathematics written by ...
Faraday's law of induction (or simply Faraday's law) is a law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (emf). This phenomenon, known as electromagnetic induction, is the fundamental operating principle of transformers, inductors, and many types of electric ...
The historicity of the Bible is the question of the Bible 's relationship to history —covering not just the Bible's acceptability as history but also the ability to understand the literary forms of biblical narrative. [1] One can extend biblical historicity to the evaluation of whether or not the Christian New Testament is an accurate record ...
The extant manuscripts of this type date from the 5th century or later; however, papyrus fragments show that this text-type may date as early as the Alexandrian or Western text-types. [26] : 45–48 The Byzantine text-type served as the basis for the 16th century Textus Receptus , produced by Erasmus , the first Greek-language printed edition ...
Some of the proofs of Fermat's little theorem given below depend on two simplifications. The first is that we may assume that a is in the range 0 ≤ a ≤ p − 1. This is a simple consequence of the laws of modular arithmetic; we are simply saying that we may first reduce a modulo p. This is consistent with reducing modulo p, as one can check.
In the 1950s, Hillel Furstenberg introduced a proof by contradiction using point-set topology. Define a topology on the integers Z, called the evenly spaced integer topology, by declaring a subset U ⊆ Z to be an open set if and only if it is either the empty set, ∅, or it is a union of arithmetic sequences S(a, b) (for a ≠ 0), where
The intersection of two (and hence finitely many) open sets is open: let U 1 and U 2 be open sets and let x ∈ U 1 ∩ U 2 (with numbers a 1 and a 2 establishing membership). Set a to be the least common multiple of a 1 and a 2. Then S(a, x) ⊆ S(a i, x) ⊆ U i. This topology has two notable properties:
Fundamental theorem of arithmetic. Gauss–Markov theorem (brief pointer to proof) Gödel's incompleteness theorem. Gödel's first incompleteness theorem. Gödel's second incompleteness theorem. Goodstein's theorem. Green's theorem (to do) Green's theorem when D is a simple region. Heine–Borel theorem.