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  2. Word equation - Wikipedia

    en.wikipedia.org/wiki/Word_equation

    One stark difference is that Diophantine equations have an undecidable solubility problem, [2] whereas the analogous problem for word equations is decidable. [ 3 ] A classical example of a word equation is the commutation equation x w = ⋅ w x {\displaystyle xw{\overset {\cdot }{=}}wx} , in which x {\displaystyle x} is an unknown and w ...

  3. Calf (animal) - Wikipedia

    en.wikipedia.org/wiki/Calf_(animal)

    Bobby calves are young calves which are to be slaughtered for human consumption. [1] A vealer is a calf weighing less than about 330 kg (730 lb) which is at about eight to nine months of age. [2] A young female calf from birth until she has had a calf of her own is called a heifer [3] (/ ˈ h ɛ f ər /).

  4. Calf - Wikipedia

    en.wikipedia.org/wiki/Calf

    Calf (pl.: calves) most often refers to: Calf (animal) , the young of domestic cattle. Calf (leg) , in humans (and other primates), the back portion of the lower leg

  5. List of equations - Wikipedia

    en.wikipedia.org/wiki/List_of_equations

    Doppler equations; Drake equation (aka Green Bank equation) Einstein's field equations; Euler equations (fluid dynamics) Euler's equations (rigid body dynamics) Relativistic Euler equations; Euler–Lagrange equation; Faraday's law of induction; Fokker–Planck equation; Fresnel equations; Friedmann equations; Gauss's law for electricity; Gauss ...

  6. Mathematical and theoretical biology - Wikipedia

    en.wikipedia.org/wiki/Mathematical_and...

    A model of a biological system is converted into a system of equations, although the word 'model' is often used synonymously with the system of corresponding equations. The solution of the equations, by either analytical or numerical means, describes how the biological system behaves either over time or at equilibrium. There are many different ...

  7. The word theory in "the theory of evolution" does not imply scientific doubt regarding its validity; the concepts of theory and hypothesis have specific meanings in a scientific context. While theory in colloquial usage may denote a hunch or conjecture, a scientific theory is a set of principles that explains an observable phenomenon in natural ...

  8. Cattle - Wikipedia

    en.wikipedia.org/wiki/Cattle

    Beef calves suckle an average of 5 times per day, spending some 46 minutes suckling. There is a diurnal rhythm in suckling, peaking at roughly 6am, 11:30am, and 7pm. [21] Under natural conditions, calves stay with their mother until weaning at 8 to 11 months. Heifer and bull calves are equally attached to their mothers in the first few months ...

  9. Archimedes's cattle problem - Wikipedia

    en.wikipedia.org/wiki/Archimedes's_cattle_problem

    Archimedes's cattle problem (or the problema bovinum or problema Archimedis) is a problem in Diophantine analysis, the study of polynomial equations with integer solutions. Attributed to Archimedes , the problem involves computing the number of cattle in a herd of the sun god from a given set of restrictions.