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  2. Tinbergen's four questions - Wikipedia

    en.wikipedia.org/wiki/Tinbergen's_four_questions

    Cartwright, John (2000) Evolution and Human Behaviour, MIT Press, ISBN 0-262-53170-4. Krebs, John R., Davies N.B. (1993) An Introduction to Behavioural Ecology, Blackwell Publishing, ISBN 0-632-03546-3. Lorenz, Konrad (1937) Biologische Fragestellungen in der Tierpsychologie (I.e. Biological Questions in Animal Psychology). Zeitschrift für ...

  3. Number sense in animals - Wikipedia

    en.wikipedia.org/wiki/Number_sense_in_animals

    Numerosity is believed [9] to be represented by two separate systems in animals, similarly to humans. The first system is the approximate number system, an imprecise system used for estimations of quantities. This system is distinguished by distance and magnitude effects, which means that a comparison between numbers is easier and more precise ...

  4. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    The entire fraction may be expressed as a single composition, in which case it is hyphenated, or as a number of fractions with a numerator of one, in which case they are not. (For example, "two-fifths" is the fraction2 / 5 ⁠ and "two fifths" is the same fraction understood as 2 instances of ⁠ 1 / 5 ⁠.) Fractions should always be ...

  5. Unit fraction - Wikipedia

    en.wikipedia.org/wiki/Unit_fraction

    Slices of approximately 1/8 of a pizza. A unit fraction is a positive fraction with one as its numerator, 1/ n.It is the multiplicative inverse (reciprocal) of the denominator of the fraction, which must be a positive natural number.

  6. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Humans, as well as some other animals, find symmetric patterns to be more beautiful. [201] Mathematically, the symmetries of an object form a group known as the symmetry group . [ 202 ] For example, the group underlying mirror symmetry is the cyclic group of two elements, Z / 2 Z {\displaystyle \mathbb {Z} /2\mathbb {Z} } .

  7. Talking animals in fiction - Wikipedia

    en.wikipedia.org/wiki/Talking_animals_in_fiction

    The use of talking animals enables storytellers to combine the basic characteristics of the animal with human behavior, to apply metaphor, and to entertain children as well as adults. [1] Animals are used in a variety of ways in fictional works including to illustrate morality lessons for children, to instill wonder in young readers, [ 1 ] and ...

  8. Scale model - Wikipedia

    en.wikipedia.org/wiki/Scale_model

    A scale model of the Tower of London. This model can be found inside the tower. A scale model of a hydropower turbine. A scale model is a physical model that is geometrically similar to an object (known as the prototype). Scale models are generally smaller than large prototypes such as vehicles, buildings, or people; but may be larger than ...

  9. Solving quadratic equations with continued fractions - Wikipedia

    en.wikipedia.org/wiki/Solving_quadratic...

    Denoting the two roots by r 1 and r 2 we distinguish three cases. If the discriminant is zero the fraction converges to the single root of multiplicity two. If the discriminant is not zero, and |r 1 | ≠ |r 2 |, the continued fraction converges to the root of maximum modulus (i.e., to the root with the greater absolute value).

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