# rigorous

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**rigid**— adjective Etymology: Middle English rigide, from Latin rigidus, from rigēre to be stiff Date: 15th century 1. a. deficient in or devoid of flexibility < rigid price controls > < a rigid bar of metal > b. appearing stiff and unyielding < his face… …112

**Continuous function**— Topics in Calculus Fundamental theorem Limits of functions Continuity Mean value theorem Differential calculus  Derivative Change of variables Implicit differentiation Taylor s theorem Related rates …113

**Euclidean geometry**— A Greek mathematician performing a geometric construction with a compass, from The School of Athens by Raphael. Euclidean geometry is a mathematical system attributed to the Alexandrian Greek mathematician Euclid, which he described in his… …114

**Gottfried Leibniz**— Infobox Philosopher region = Western Philosophy era = 18th century philosophy color = #B0C4DE |250px image caption = Gottfried Wilhelm Leibniz name = Gottfried Wilhelm Leibniz birth = 1 July (21 June Old Style) 1646, Leipzig, Electorate of Saxony …115

**Hard science fiction**— is a category of science fiction characterized by an emphasis on scientific or technical detail, or on scientific accuracy, or on both.[1][2] The term was first used in print in 1957 by P. Schuyler Miller in a review of John W. Campbell, Jr. s… …116

**History of mathematics**— A proof from Euclid s Elements, widely considered the most influential textbook of all time.[1] …117

**Mathematical induction**— can be informally illustrated by reference to the sequential effect of falling dominoes. Mathematical induction is a method of mathematical proof typically used to establish that a given statement is true of all natural numbers (positive… …118

**Number theory**— A Lehmer sieve an analog computer once used for finding primes and solving simple diophantine equations. Number theory is a branch of pure mathematics devoted primarily to the study of the integers. Number theorists study prime numbers (the… …119

**Science fiction**— (abbreviated SF or sci fi with varying punctuation and capitalization) is a broad genre of fiction that often involves speculations based on current or future science or technology. Science fiction is found in books, art, television, films, games …120

**Actuary**— Damage from Hurricane Katrina. Actuaries need to estimate long term averages of such damage in order to accurately price property insurance and set appropriate reserves. Occupation Names Actuary …