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Theorem stencil, sometimes also called theorem painting or velvet painting, is the art of making stencils and using them to make drawings or paintings on fabric or paper. [ 1 ] A vogue for theorem stencil painting began in England at the turn of the 18th century and through the mid-1800s. [ 2 ]
Nothing captures the playful spookiness of Halloween more than glowing jack-o'-lanterns. The post 30 Free Pumpkin Carving Templates to Take Your Jack-o’-Lantern to the Next Level appeared first ...
The Helmholtz decomposition in three dimensions was first described in 1849 [9] by George Gabriel Stokes for a theory of diffraction. Hermann von Helmholtz published his paper on some hydrodynamic basic equations in 1858, [10] [11] which was part of his research on the Helmholtz's theorems describing the motion of fluid in the vicinity of vortex lines. [11]
Fermat's Last Theorem was conjectured by Pierre de Fermat in the 1600s, states the impossibility of finding solutions in positive integers for the equation + = with >. Fermat himself gave a proof for the n = 4 case using his technique of infinite descent , and other special cases were subsequently proved, but the general case was not proven ...
Extreme couponing is an activity that combines shopping skills with couponing in an attempt to save as much money as possible while accumulating the most groceries. The concept of "extreme couponers" was first mentioned by The Wall Street Journal on March 8, 2010, in an article entitled "Hard Times Turn Coupon Clipping Into the Newest Extreme Sport". [2]
In vector calculus, the divergence theorem, also known as Gauss's theorem or Ostrogradsky's theorem, [1] is a theorem relating the flux of a vector field through a closed surface to the divergence of the field in the volume enclosed.
In an analogous way, one can obtain finite difference approximations to higher order derivatives and differential operators. For example, by using the above central difference formula for f ′(x + h / 2 ) and f ′(x − h / 2 ) and applying a central difference formula for the derivative of f ′ at x, we obtain the central difference approximation of the second derivative of f:
In geometry, Thales's theorem states that if A, B, and C are distinct points on a circle where the line AC is a diameter, the angle ∠ ABC is a right angle. Thales's theorem is a special case of the inscribed angle theorem and is mentioned and proved as part of the 31st proposition in the third book of Euclid 's Elements . [ 1 ]
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