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  2. Numerical differentiation - Wikipedia

    en.wikipedia.org/wiki/Numerical_differentiation

    The classical finite-difference approximations for numerical differentiation are ill-conditioned. However, if is a holomorphic function, real-valued on the real line, which can be evaluated at points in the complex plane near , then there are stable methods.

  3. Lewis Fry Richardson - Wikipedia

    en.wikipedia.org/wiki/Lewis_Fry_Richardson

    Lewis Fry Richardson, FRS [1] (11 October 1881 – 30 September 1953) was an English mathematician, physicist, meteorologist, psychologist, and pacifist who pioneered modern mathematical techniques of weather forecasting, and the application of similar techniques to studying the causes of wars and how to prevent them.

  4. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    The word mathematics comes from the Ancient Greek word máthēma (μάθημα), meaning ' something learned, knowledge, mathematics ', and the derived expression mathēmatikḗ tékhnē (μαθηματικὴ τέχνη), meaning ' mathematical science '. It entered the English language during the Late Middle English period through French and ...

  5. Number - Wikipedia

    en.wikipedia.org/wiki/Number

    The radix or base is the number of unique numerical digits, including zero, that a numeral system uses to represent numbers (for the decimal system, the radix is 10). In this base 10 system, the rightmost digit of a natural number has a place value of 1, and every other digit has a place value ten times that of the place value of the digit to ...

  6. Numerical range - Wikipedia

    en.wikipedia.org/wiki/Numerical_range

    In engineering, numerical ranges are used as a rough estimate of eigenvalues of A. Recently, generalizations of the numerical range are used to study quantum computing. A related concept is the numerical radius, which is the largest absolute value of the numbers in the numerical range, i.e.

  7. Learning - Wikipedia

    en.wikipedia.org/wiki/Learning

    Learning is the process of acquiring new understanding, knowledge, behaviors, skills, values, attitudes, and preferences. [1] The ability to learn is possessed by humans, non-human animals, and some machines; there is also evidence for some kind of learning in certain plants. [2]

  8. Acronym - Wikipedia

    en.wikipedia.org/wiki/Acronym

    The forward slash is still common in many dialects for some fixed expressions—such as in w/ for "with" or A/C for "air conditioning"—while only infrequently being used to abbreviate new terms. The apostrophe is common for grammatical contractions (e.g. don't , y'all , and ain't ) and for contractions marking unusual pronunciations (e.g. a ...

  9. Egypt - Wikipedia

    en.wikipedia.org/wiki/Egypt

    The canal is 193.30 km (120 + 1 ⁄ 8 mi) long, 24 metres (79 feet) deep and 205 m (673 ft) wide as of 2010. It consists of the northern access channel of 22 km (14 mi), the canal itself of 162.25 km (100 + 7 ⁄ 8 mi) and the southern access channel of 9 km (5 + 1 ⁄ 2 mi). The canal is a single lane with passing places in the Ballah By-Pass ...